chore: gitignore local cocoindex index + blog drafts

[drakulavich]

Adds two local-only directories to .gitignore so they stop showing up as untracked:

• .cocoindex_code/ — local ccc/cocoindex code index (grouped with the existing .omc/, .claude/, .codegraph/ agent/dev-state entries).
• docs/blog/ — local blog drafts, not part of the shipped project.

Neither was ever committed; this just keeps git status clean.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR adds two local-only paths to .gitignore to keep git status clean without affecting any tracked files or build output. Both .cocoindex_code/ and docs/blog/ are correctly formed patterns grouped with appropriate comments.

Confidence Score: 5/5

This PR adds two new ignore entries to .gitignore and touches nothing else — straightforward and safe to merge.

Both patterns are correctly formed: .cocoindex_code/ fits naturally into the existing local dev-state group, and docs/blog/ is root-anchored so it only matches the intended directory. No tracked files are affected and no build or runtime behavior changes.

No files require special attention.

Important Files Changed

Filename	Overview
.gitignore	Adds .cocoindex_code/ to the existing local dev-state group and docs/blog/ as a new root-anchored ignore entry; both patterns are correct and well-grouped.

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