docs(forge): add behavior and todos for edge cases

[tugrulates]

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PR Overview

This PR updates the documentation for GitHub release creation and package version bump operations to better describe the behavior in edge cases. It also adds TODOs to track future improvements.

• Updated the doc comment in release.ts to clarify that an existing release will be updated and to include a TODO for calculating a changelog.
• Enhanced the doc comment in bump.ts to note that an open bump PR will be updated and added a TODO for version recalculation when the bump PR is rebased.

Reviewed Changes

File	Description
tool/forge/release.ts	Updated the function documentation to reflect release update behavior and to add a changelog TODO.
tool/forge/bump.ts	Updated the function documentation to reflect behavior for updating open bump PRs and added a version recalculation TODO.

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tool/forge/release.ts:46

• Consider adding tests to verify that an existing release is updated correctly as described in the documentation.

 * If a release already exists for the same module and version, it will be

tool/forge/bump.ts:46

• Consider adding tests to ensure that an open bump PR is updated with the new version information, as noted in the documentation.

 * When working with pull requests, if there is an open one for a bump, it will