Add Zed extension support

[keejkrej]

Summary

• add a Zed extension for Zero .0 files with language detection, Tree-sitter syntax highlighting queries, editor queries, brackets, text objects, and snippets
• include a Tree-sitter grammar for Zero and tests for the extension manifest, language config, queries, snippets, and dev-extension preparation
• prepare local Zed dev installs by creating a temporary fetchable grammar repo for Zed's grammar build step

Closes #25.

Tests

• npm run extension:zed:prepare
• npm run extension:zed:test
• npx --yes tree-sitter-cli@0.25.10 test

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​tree-sitter-cli@​0.25.10
	npm/​toml@​3.0.0

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