This moves all the static .js from webtiles into the appropriate
project src file. This commit literally just moves the files so that
git can track the history of the files and (hopefully) help resolve
conflicts if any other developers have touched these files.

Get the new bundling system working, and use the biome tool to apply
linting fixes and auto formatting to .js files across the board.

Add necessary steps in the Makefile and in CI to produce the .js
bundles as required when dependencies have changed, running `npm ci`
as necessary if any package.json or related files have changed.

CI pipelines have a nodejs installation added. I have not included
nodejs in deps.py, as the installation varies from system to system.
This must be documented in a further commit (once I am confident what
the documentation needs to be exactly).