Support global and project indexing toggles

[marius-kilocode]

Summary

• Support global indexing enablement while keeping project opt-in available when global indexing is off.
• Split VS Code and TUI indexing controls into global and project toggles, with the project toggle disabled when global indexing covers the workspace.
• Keep global config available in settings state and add localized strings for the new indexing controls.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 file)

• packages/opencode/test/cli/cmd/tui/sync.test.tsx

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_{Reviewed by gpt-5.5-20260423 · 1,068,643 tokens}