docs(init): add documentation and experimental notice for sentry init

[betegon]

Summary

Adds complete documentation for the sentry init command and surfaces its experimental status.

docs/src/content/docs/commands/init.md

• Adds experimental callout at the top
• Notes that sentry init works out of the box from the repo root with no arguments
• Fixes usage signature to include [target] positional
• Adds "Target syntax" section documenting all org/project combinations (acme/, acme/my-app, my-app, auto-detect)
• Adds missing --team / -t flag to options table
• Expands features list to all 10 supported values (errors, tracing, logs, replay, metrics, profiling, sourcemaps, crons, ai-monitoring, user-feedback)
• Adds examples for target syntax and --team

src/commands/init.ts

• Prepends experimental warning to fullDescription (shown in sentry init --help)
• Updates brief to flag the command as experimental in command listings

Test plan

• sentry init --help — confirm experimental notice and all flags appear
• Review rendered docs page for init

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Semver Impact of This PR

🟢 Patch (bug fixes)

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Bug Fixes 🐛

Event

• Detect org/ISSUE-SHORT-ID in event view single-arg path (CLI-9K) by BYK in #529
• Auto-redirect issue short IDs in event view (CLI-JR) by BYK in #524

Other

• (api) Strip api/0/ prefix and exclude NodeSystemError integration (CLI-K1) by BYK in #523
• (dashboard) Add missing datasets to agent guidance by betegon in #522
• Handle invalid URLs gracefully in response cache (CLI-GC) by BYK in #528
• Avoid double-prefixing in buildCommandHint for slashed args (CLI-8C) by BYK in #527
• Handle full short IDs and numeric IDs in multi-slash issue args (CLI-KC, CLI-B6) by BYK in #526
• Auto-recovery for wrong entity types across commands (CLI-G6, CLI-K6, CLI-JR) by BYK in #525

Documentation 📚

• (init) Add documentation and experimental notice for sentry init by betegon in #530

Internal Changes 🔧

• Regenerate skill files by github-actions[bot] in 22b5281d

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Codecov Results 📊

✅ 126 passed | Total: 126 | Pass Rate: 100% | Execution Time: 0ms

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ No test changes detected

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 1076 uncovered lines.
✅ Project coverage is 95.81%. Comparing base (base) to head (head).

Coverage diff

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+ Coverage    95.81%    95.81%        —%
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  Files          185       185         —
  Lines        25679     25679         —
  Branches         0         0         —
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+ Hits         24603     24603         —
- Misses        1076      1076         —
- Partials         0         0         —

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