docs: add agentic usage documentation

[sergical]

Summary

• Add new documentation page explaining the Sentry CLI skill for AI coding agents
• Add sidebar entry under Resources section
• Add link in Installation page's Next Steps section

Test plan

• Build completes successfully
• Preview deployment renders the new page correctly
• Sidebar shows "Agentic Usage" under Resources
• Link from Installation page works

🤖 Generated with Claude Code

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

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Documentation 📚

• Add agentic usage documentation by sergical in #142

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_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

Codecov Results 📊

✅ Patch coverage is 100.00%. Project has 1769 uncovered lines.
✅ Project coverage is 70.04%. Comparing base (base) to head (head).

Files with missing lines (24)

File	Patch %	Lines
human.ts	30.90%	⚠️ 682 Missing
resolve-target.ts	20.82%	⚠️ 251 Missing
oauth.ts	25.39%	⚠️ 191 Missing
api-client.ts	71.60%	⚠️ 146 Missing
resolver.ts	3.23%	⚠️ 120 Missing
errors.ts	5.94%	⚠️ 95 Missing
migration.ts	47.44%	⚠️ 82 Missing
api.ts	89.80%	⚠️ 47 Missing
seer.ts	75.54%	⚠️ 45 Missing
seer.ts	79.87%	⚠️ 30 Missing
preload.ts	39.02%	⚠️ 25 Missing
detector.ts	87.79%	⚠️ 16 Missing
auth.ts	94.78%	⚠️ 7 Missing
utils.ts	97.59%	⚠️ 4 Missing
schema.ts	85.19%	⚠️ 4 Missing
index.ts	95.06%	⚠️ 4 Missing
colors.ts	91.84%	⚠️ 4 Missing
telemetry.ts	97.28%	⚠️ 4 Missing
env-file.ts	97.17%	⚠️ 3 Missing
sentry-urls.ts	82.35%	⚠️ 3 Missing
alias.ts	98.56%	⚠️ 2 Missing
project-aliases.ts	97.40%	⚠️ 2 Missing
java.ts	97.22%	⚠️ 1 Missing
parser.ts	98.63%	⚠️ 1 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    70.04%    70.04%        —%
==========================================
  Files           51        51         —
  Lines         5904      5904         —
  Branches         0         0         —
==========================================
+ Hits          4135      4135         —
- Misses        1769      1769         —
- Partials         0         0         —

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Generated by Codecov Action

[github-actions]

PR Preview Action v1.8.1
🚀 View preview at https://cli.sentry.dev/pr-preview/pr-142/
Built to branch gh-pages at 2026-01-31 02:05 UTC. Preview will be ready when the GitHub Pages deployment is complete.