feat(init): accept multiple delimiter formats for --features flag

[betegon]

Summary

Makes --features more flexible per @BYK's review feedback. Now accepts:

• Comma: --features errors,tracing,logs
• Plus: --features errors+tracing+logs
• Space (quoted): --features "errors tracing logs"
• Repeated: --features errors --features tracing
• Mixed: --features errors,tracing --features logs

The flag is now variadic (collects multiple values into an array) with a regex split on ,, +, and space delimiters.

Changes

• Flag type changed from string to string[] with variadic: true
• Parsing uses flatMap + regex split across all entries
• Updated brief to drop "Comma-separated" prefix
• Added tests for plus, space, and repeated flag scenarios

Test plan

• bun run typecheck passes
• bun run lint passes
• bun test test/commands/init.test.ts — 10/10 pass

🤖 Generated with Claude Code

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

Init

• Accept multiple delimiter formats for --features flag by betegon in #386

• Accept multiple delimiter formats for --features flag by betegon in #386
• Add git safety checks before wizard modifies files by betegon in #379
• Add experimental warning before wizard runs by betegon in #378
• Add init command for guided Sentry project setup by betegon in #283

Other

• (issue-list) Redesign table to match Sentry web UI by BYK in #372
• Return-based output with OutputConfig on buildCommand by BYK in #380
• Add --fields flag for context-window-friendly JSON output by BYK in #373
• Magic @ selectors (@latest, @most_frequent) for issue commands by BYK in #371
• Input hardening against agent hallucinations by BYK in #370
• Add response caching for read-only API calls by BYK in #330

Bug Fixes 🐛

Init

• Remove implementation detail from help text by betegon in #385
• Truncate uncommitted file list to first 5 entries by MathurAditya724 in #381

Other

• (api) Convert --data to query params for GET requests by BYK in #383
• (docs) Remove double borders and fix column alignment on landing page tables by betegon in #369
• Add trace ID validation to trace view + UUID dash-stripping by BYK in #375

Internal Changes 🔧

Init

• Remove --force flag by betegon in #377
• Remove dead determine-pm step label by betegon in #374

Other

• Converge Tier 1 commands to writeOutput helper by BYK in #376

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[github-actions]

Codecov Results 📊

✅ 104 passed | Total: 104 | 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 899 uncovered lines.
✅ Project coverage is 95.48%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
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+ Coverage    95.48%    95.48%        —%
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  Files          142       142         —
  Lines        19898     19901        +3
  Branches         0         0         —
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+ Hits         18999     19002        +3
- Misses         899       899         —
- Partials         0         0         —

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