45 bug fixes

[matthewhilton]

Issues
2 issues:

1. For mobile offline, When the library submodule changes it font files, it would previously completely error out
2. The icon had some filter being applied to it making it unreadable

Changes

1. If a font file is missing we just skip it. There isn't a nice way to tell exactly what files are where, so for now I think just manually updating this list when needed is ok. Also added the newer font files that are in the newer library submodule versions. (did not update the library submodule, as that is another can of worms)
2. Icon fixed by defining hvp_is_branded() -> true which tells moodle not to apply the filter to the image (this is the same thing that mod_h5p does)

Testing

1. Font file - correctly skips font files
2. Icon - correctly shows the icon without filtering

CI Note
Additionally, I updated the CI to only run unit tests - we are not going to fix the pre-existing style issues inherited from the upstream.