Split GitHub action jobs

[Lukewh]

Currently, release does the following in a single job 'build-and-release':

1. Actual release:

• Run the build script
• Uploads the built .tar.gz to the latest release

2. Prepares and pushes the built files to github pages

• Creates a docs folder
• Copies build files to the docs folder
• Creates index.html
• Adds docs folder to git and pushes to gh-pages branch

3. Prepares and pushes the built files to quickgui branch for submodule access

• Copies all build files to root of project
• Adds new files to git and pushes to quickgui branch

These should be split at the numbers into 3 separate jobs.

3. Should also remove all other files that aren't the built SVGs to remove unnecessary files in quickgui.