fix: chore: create formula label in Codeberg + add more formula templates (#22)
- Add formulas/upgrade-dependency.toml: multi-ecosystem (npm/cargo/forge) dependency upgrade
with steps for checking changelog, upgrading, applying breaking changes, and running tests
- Add formulas/add-rpc-method.toml: JSON-RPC method addition with steps for reading
existing patterns, implementing handler, registering, writing tests, and running tests
- Document `formula` label in BOOTSTRAP.md optional labels table
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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