Improve publish workflow

[sampullman]

The workflow for publishing is janky and undocumented.

Currently the rough steps are:

• Make sure latest packages are installed
• Build library and Vue plugin
• Run library and plugin tests
• Manually bump plugin version
• Run pnpm run release for basic checks and library version bump
• Run pnpm publish on library and plugin

Tasks

• Add one of the release tools listed here
• Investigate Github release automation
• Add changelog generation