camel-tui: Keystroke overlay, sorting, and UI improvements

[davsclaus]

Summary

• Add keystroke overlay in footer during recording mode (--record) showing recent key presses with fade effect
• Add F2 menu toggle to enable/disable keystroke display without --record
• Make F2 actions menu global (works on all tabs, not just overview)
• Add sorting to Health tab (group/name/status) and TOTAL column to HTTP tab sort
• Fix PgUp/PgDn in Log tab
• Default overview chart to single mode
• Add .adoc fallback for bundled example documentation

Test plan

• Run camel monitor and verify F2 opens actions menu from any tab
• F2 → Show Keystrokes → press keys → verify keystroke badges appear right-aligned in footer
• Verify keystrokes fade (bright→dim→gone over 2 seconds)
• Tab 7 (Health) → press s to cycle sort columns
• Tab 6 (HTTP) → press s to sort by TOTAL
• Tab 2 (Log) → PgUp/PgDn scrolls by 20 lines
• F2 → Run Example → select bundled example → press d for docs
• Verify chart defaults to single mode on startup

🤖 Generated with Claude Code

[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• dsl/camel-jbang/camel-jbang-plugin-tui

All tested modules (2 modules)

• Camel :: JBang :: Plugin :: TUI
• Camel :: Launcher :: Container

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