Refine plugin page: collapsible details, condensed price card, masked credentials & Ultra banner

[simonhamp]

What & why

A set of UI refinements to the public plugin page (resources/views/plugin-show.blade.php) to tidy up the sidebar and improve clarity.

Plugin Details — collapsible

• The Plugin Details sidebar section is now collapsible and collapsed by default, using the existing Alpine x-collapse pattern. A chevron in the header rotates to indicate state.

Price card — condensed

• Removed the redundant "Price" label.
• When a discount applies, the strike-through regular price now sits inline, before the discounted price (matching the strike-through convention used elsewhere in the app).

"Included with Ultra" card

• Moved directly under the Add to Cart card.
• Always visible (no longer hidden behind @auth) on paid first-party (official) plugins, for guests and logged-in users alike.
• For users with an active Ultra subscription, the copy adapts and the button links to their Ultra dashboard (/dashboard/ultra); everyone else gets the "Learn more" → pricing button.

Masked install credentials

• The logged-in install command now masks the email and license key by default (e.g. d••••••@example.com and a bulleted key).
• The copy button still copies the real underlying values to the clipboard.

Tests

Added feature tests:

• PluginShowPriceCardTest — price label removed, strike-through-before-current ordering, collapsed-by-default details markup.
• PluginShowUltraCardTest — card shows on paid first-party plugins, hidden on free/third-party, Ultra subscribers get the dashboard link.
• PluginShowInstallCredentialsTest — credentials render masked while the copy command retains the real values.

All plugin-page tests pass; Pint clean.

Note: a few incidental, pre-existing working-tree changes are included (PHP patch version bump in the Boost guideline files, workspace name in package-lock.json).

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