feat: show all CLI commands in TUI with / toggle

[notgitika]

Description

Show all CLI commands in the TUI's HelpScreen, including CLI-only commands (logs, traces, pause, resume) that were previously hidden. These commands are grouped under a "CLI only ───" divider section with a / keyboard toggle to show/hide them.

Key changes:

• Added cliOnly flag to CommandMeta interface to distinguish interactive vs CLI-only commands
• Narrowed HIDDEN_FROM_TUI to only ['help']; package and update are now visible (they have TUI screens)
• Added / toggle in HelpScreen to show/hide CLI-only commands section with visual divider
• Search always finds CLI-only commands regardless of toggle state
• Selecting a CLI-only command navigates to CliOnlyScreen with usage examples
• Added CLI_ONLY_EXAMPLES constant with usage info for logs, traces, pause, resume

Related Issue

Closes #566

Documentation PR

N/A

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

Testing

How have you tested the change?

• I ran npm run test:unit and npm run test:integ
• I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the
terms of your choice.

[Hweinstock]

Looks like a new unit test is failing.

FAIL  unit  src/cli/tui/utils/__tests__/commands.test.ts > getCommandsForUI > includes update and package as interactive commands
AssertionError: expected undefined to be defined
 ❯ src/cli/tui/utils/__tests__/commands.test.ts:46:20
     44|     const update = cmds.find(c => c.id === 'update');
     45|     const pkg = cmds.find(c => c.id === 'package');
     46|     expect(update).toBeDefined();
       |                    ^
     47|     expect(update!.cliOnly).toBe(false);
     48|     expect(pkg).toBeDefined();

Does this mean update isn't showing up?