refactor: migrate to git-bot-feedback lib

[2bndy5]

resolves #97

This has 2 main benefits:

1. Improved PR review support. The git-bot-feedback lib automatically hides outdated suggestions and reviews.
2. Any further CI platform support can get implemented in the git-bot-feedback lib. This way, cpp-linter gets the newly supported CI platforms for "free."

During review, I found a way to remove dependence on OpenSSL in both libgit2 and reqwest libraries. We are now using rustls as our TLS backend for HTTP requests.

Summary by CodeRabbit

• New Features

  • Improved error and reporting behavior for clearer CI feedback.

• Bug Fixes

  • Progress indicators now show trimmed, contextual filenames.
  • Coverage command simplified to generate HTML output.

• Refactor

  • Reworked REST/client and feedback plumbing for more consistent PR reporting.

• Chores

  • Dependency bumps and CI/build matrix adjustments; updated packaging and test fixtures.

[codecov]

Codecov Report

❌ Patch coverage is 95.03205% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.94%. Comparing base (b59085b) to head (8cb6254).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cpp-linter/src/clang_tools/mod.rs	58.62%	24 Missing ⚠️
cpp-linter/src/git.rs	94.36%	4 Missing ⚠️
clang-installer/src/tool.rs	66.66%	2 Missing ⚠️
cpp-linter/src/rest_client/mod.rs	99.74%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #304      +/-   ##
==========================================
- Coverage   92.60%   90.94%   -1.66%     
==========================================
  Files          26       22       -4     
  Lines        4339     3368     -971     
==========================================
- Hits         4018     3063     -955     
+ Misses        321      305      -16     

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 61972d34-5e9a-465f-869d-030a6127853b

📥 Commits

Reviewing files that changed from the base of the PR and between 458c876 and 8cb6254.

📒 Files selected for processing (2)

• cpp-linter/src/git.rs
• cpp-linter/src/rest_client/mod.rs

Walkthrough

Migrate internal REST/filtering to a new RestClient backed by git-bot-feedback, add typed error enums, adapt clang-tools and FileObj flows to structured errors, rewire run_main and tests to use RestClient and updated file filters, and update CI/tooling/manifests and fixtures.

Changes

Rest client and pipeline migration

Layer / File(s)	Summary
CI, packaging, and tooling configuration .github/workflows/*, CONTRIBUTING.md, nurfile, cspell.config.yml, bindings/*	Update GitHub Actions matrices/commands, remove/adjust openssl-vendored flags, change coverage command alias to nur test html, add nur pre alias, and tweak packaging/freebsd/linux build steps.
Dependency and Cargo manifest updates Cargo.toml, cpp-linter/Cargo.toml, bindings/*, clang-installer/Cargo.toml	Bump workspace and crate dependencies, add/remove features (git-bot-feedback), move TLS reqwest config, and update bindings manifests.
Typed errors and public API wiring cpp-linter/src/error.rs, cpp-linter/src/lib.rs, cpp-linter/src/cli/structs.rs	Add SuggestionError/FileObjError/ClientError, expose error module, and add conversions/adaptations for external LinesChangedOnly and FileFilter usage.
RestClient implementation and markdown builders cpp-linter/src/rest_client/mod.rs	New RestClient wrapper: changed-file retrieval, annotations, step-summary/comment builders, post_feedback orchestration, output variable writing, and tests.
Clang-tools: filters, suggestions, and error flow cpp-linter/src/clang_tools/*	Switch filter predicates to is_qualified, change capture signature to take &RestClient, convert suggestion/patch error handling to SuggestionError, and adjust summarize/patch APIs.
Common FS and FileObj changes cpp-linter/src/common_fs/*, removal of file_filter.rs	FileObj patch application now returns FileObjError; old FileFilter module removed in favor of external filter; imports consolidated.
Run integration and test migration cpp-linter/src/run.rs, cpp-linter/tests/*, test fixtures under cpp-linter/tests/*	Rewire run_main to use RestClient, named log groups, directory-walk fallback, temp GITHUB_OUTPUT helper; update many tests and fixtures to match new REST client and payload shapes.

• Estimated code review effort:
  🎯 4 (Complex) | ⏱️ ~75 minutes

• Possibly related PRs:

• cpp-linter/cpp-linter-rs#52: Related log-group and RestApiClient responsibility refactor.

• cpp-linter/cpp-linter-rs#200: Related OpenSSL/vendored dependency and build feature changes.

• cpp-linter/cpp-linter-rs#47: Related signature and typed error propagation changes.

• Suggested labels:
  dependencies, rust

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'refactor: migrate to git-bot-feedback lib' clearly and concisely summarizes the main change—migrating the rest_api module functionality to an external library.
Linked Issues check	✅ Passed	The PR successfully addresses all coding requirements from issue #97: trait-based abstractions, thread comments, step summaries, file annotations, PR reviews, and changed file retrieval using the external git-bot-feedback library.
Out of Scope Changes check	✅ Passed	All changes are directly related to the migration objective. Updates to dependencies, CI workflows, test assets, and documentation are necessary components of integrating the external library and removing the internalized rest_api module.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch switch-to-git-bot-feedback