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>

internal/cache/cache.go

@@ -44,9 +44,11 @@ type HealthEntry struct {
 	Stars      int       `yaml:"stars,omitempty"`
 	Forks      int       `yaml:"forks,omitempty"`
 	LastPush   time.Time `yaml:"last_push,omitempty"`
-	HasLicense bool      `yaml:"has_license,omitempty"`
-	HasReadme  bool      `yaml:"has_readme,omitempty"`
-	CheckedAt  time.Time `yaml:"checked_at"`
+	HasLicense  bool      `yaml:"has_license,omitempty"`
+	HasReadme   bool      `yaml:"has_readme,omitempty"`
+	CheckedAt   time.Time `yaml:"checked_at"`
+	Category    string    `yaml:"category,omitempty"`
+	Description string    `yaml:"description,omitempty"`
 }
 
 // HealthCache is the full YAML cache file.