Updates the snapshot publishing script to package the contents of
`skills/dev-skills` and publish them to the `angular/skills`
repository.
The changes include:
- Ensuring the script always runs from the repository root.
- Updating `publishRepo` to support an optional third argument for
specifying a custom repository name (defaulting to `-builds`).
- Implementing `publishDevSkills` to package individual skills at the
root of the snapshot repository.
This commit updates the scripts to use the version from `package.json` for snapshot builds, ensuring that the git tags are aligned with the package version. This change simplifies referencing snapshot builds in the `package.json` file.
PR Close#64350