chore: add .claude/tsc-cache to .gitignore

[ian-flores]

Summary

• Add .claude/tsc-cache/ to .gitignore to prevent accidentally committing Claude Code TypeScript cache files

Test plan

• Verify .gitignore syntax is correct
• Confirm the pattern matches .claude/tsc-cache/ directory

This prepares main branch to properly ignore tsc-cache files before cleaning them from PR #94.

[claude]

Claude finished @ian-flores's task —— View job

---

PR Review: Add .claude/tsc-cache to .gitignore

• Read review guidelines
• Get PR diff and review changed files
• Submit review

Reviewed this PR. The change is clean and correct — scoping the ignore to .claude/tsc-cache/ (rather than all of .claude/) is appropriate since .claude/ contains tracked config files. Left a review comment with that observation and a self-review norm reminder.

[claude]

Clean, minimal change. The .gitignore entry correctly targets .claude/tsc-cache/ and follows the existing file conventions (grouped section with a comment header).

Observations:

• Scoping is correct: Since .claude/ contains tracked files (e.g., review-guidelines.md), ignoring only the tsc-cache/ subdirectory rather than the entire .claude/ directory is the right call.
• Pattern syntax: .claude/tsc-cache/ with the trailing slash correctly matches only the directory, which is appropriate here.
• PR description note: The description mentions this prepares main for cleaning tsc-cache from PR #94 — that sequencing makes sense.

Self-review norm reminder: Per the repo's review guidelines, consider adding inline comments on your own diffs to highlight key decisions for reviewers (e.g., why tsc-cache specifically rather than the whole .claude/ directory).