Expose counter information in profiler-cli

[fatadel]

Add counter list and counter info <handle> commands, and list each counter under its process in profile info, to inspect any counter track from the terminal. Counters get stable c-N handles, like threads and functions.

Per-counter stats come from the counter's own tooltip schema, reusing the timeline tooltips' labels and formatters so the CLI and UI agree. Stats respect the current zoom.

This is only the first iteration for #6040.

---

Usage examples

➜  profiler git:(issue-6040-1) pq counter list
[Thread: t-7 (GeckoMain) | View: Full profile | Full: 3.449s]

Counters (22):
  c-0: Bandwidth (Bandwidth) - Data transferred in the visible range: 182KB (0.020 g CO₂e) [67 samples]
  c-1: Process CPU (CPU) [345 samples]
...

➜  profiler git:(issue-6040-1) pq counter info c-1
[Thread: t-7 (GeckoMain) | View: Full profile | Full: 3.449s]

Counter c-1: Process CPU
  Name: processCPU
  Category: CPU
  Description: Process CPU utilization
  Unit: percent
  Graph type: line-rate
  Main thread: t-0 (GeckoMain)
  Samples: 345 total, 345 in current range
  Time span: 2h9m → 2h9m

[Thread: t-7 (GeckoMain) | View: Full profile | Full: 3.449s]

Name: Firefox 150 – macOS 26.5.0
Platform: macOS 26.5.0

This profile contains 8 threads across 7 processes.

Top processes and threads by CPU usage:
  p-0: Parent Process [pid 1999] [ts<12W → end] - 297.869ms
    t-0: GeckoMain [tid 16337] - 297.869ms
    c-0: Bandwidth - Data transferred in the visible range: 182KB (0.020 g CO₂e) [67 samples]
    c-1: Process CPU [345 samples]
    c-2: Memory - memory range in graph: 13.7MB [322 samples]
    c-3: Process Power - Energy used in the visible range: 185 µWh (0.088 mg CO₂e) [345 samples]
...

CPU activity over time:
- 22% for 769.4ms: [ts-1 → ts-z] (14.371ms - 3.438s)
  - 60% for 62.0ms: [ts-1 → ts-3] (14.371ms - 117.22ms)
...

[codecov]

Codecov Report

❌ Patch coverage is 0.86207% with 115 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.43%. Comparing base (a99497b) to head (ec80263).
⚠️ Report is 24 commits behind head on main.

Files with missing lines	Patch %	Lines
src/profile-query/formatters/counter-info.ts	1.12%	88 Missing ⚠️
src/profile-query/counter-map.ts	0.00%	13 Missing ⚠️
src/profile-query/formatters/profile-info.ts	0.00%	7 Missing ⚠️
src/profile-query/index.ts	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6084      +/-   ##
==========================================
- Coverage   83.82%   83.43%   -0.39%     
==========================================
  Files         330      339       +9     
  Lines       34682    35690    +1008     
  Branches     9703    10017     +314     
==========================================
+ Hits        29072    29779     +707     
- Misses       5181     5483     +302     
+ Partials      429      428       -1     

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[canova]

pq profile info --counters: I don't think we should have --counters, we should directly put the counters into the list. Similar to how we have a track list in the profiler UI.

[fatadel]

@canova makes sense, updated.