feat(cli): add non-interactive usage command

[binichallein]

Resolve #2169

Summary

• Add a lazy-loaded kimi usage subcommand for non-interactive Kimi Code quota checks.
• Support default Rich panel output plus --json for scripts and CI.
• Reuse the existing shell /usage request, parsing, and rendering logic, and document the CLI path in English and Chinese docs.

Test Plan

• RED: uv run pytest tests/core/test_usage_cli.py tests/core/test_startup_imports.py -q failed before implementation with missing usage command.
• GREEN: uv run pytest tests/core/test_usage_cli.py tests/core/test_startup_imports.py tests/ui/test_usage.py -q (43 passed, 1 upstream deprecation warning).
• uv run ruff check src/kimi_cli/cli/usage.py src/kimi_cli/cli/_lazy_group.py src/kimi_cli/ui/shell/usage.py tests/core/test_usage_cli.py tests/core/test_startup_imports.py tests/ui/test_usage.py.
• uv run ruff format --check src/kimi_cli/cli/usage.py src/kimi_cli/cli/_lazy_group.py src/kimi_cli/ui/shell/usage.py tests/core/test_usage_cli.py tests/core/test_startup_imports.py tests/ui/test_usage.py.
• uv run pyright src/kimi_cli/cli/usage.py src/kimi_cli/ui/shell/usage.py tests/core/test_usage_cli.py.
• git diff --check.
• npx -y node@20 scripts/sync-changelog.mjs and npx -y node@20 node_modules/vitepress/bin/vitepress.js build from docs/; docs dependencies were provided via a temporary local node_modules symlink because fresh npm install --no-package-lock stalled without output.

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.