Feat/tui browse (#1266)

* Add interactive TUI browser command using Bubbletea v2

Adds `awesome-docker browse` to interactively explore the curated list
in a terminal UI with a category tree (left panel) and detailed resource
view (right panel). Enriches health_cache.yaml with category and
description fields so the cache is self-contained for the TUI.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add TUI pagination, scrolloff, and fix visual overflow

Add pagination keybindings (Ctrl+D/PgDn, Ctrl+U/PgUp, g/Home, G/End)
to both tree and list panels. Implement scrolloff (4 lines) to keep
context visible around the cursor. Fix list panel overflow caused by
Unicode characters (★, ⑂) rendering wider than lipgloss measures,
which pushed the footer off-screen. Improve selection highlight
visibility with background colors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Makefile

@@ -125,6 +125,9 @@ report-json-file: $(HEALTH_REPORT_JSON) ## Generate HEALTH_REPORT.json from cach
 
 health-report: health report-file ## Refresh health cache then generate HEALTH_REPORT.md
 
+browse: build ## Launch interactive TUI browser
+	./$(BINARY) browse
+
 workflow-dev: fmt test lint check-pr website ## Full local development workflow
 
 workflow-pr: fmt test validate ## Recommended workflow before opening a PR