In the ruff config file added in #6954 explicitly selecting the ruff
rules to check was missed, resulting in ruff only checking a very small
subset of its available rules. That hasn't been desired, so this is the
first of a series of commits enabling more rules. In this PR all rules
whose violations can be either automatically fixed by ruff or are
trivial to fix manually get enabled. For the follow up PRs it's intended
to focus on one area of rules per PR to gradually improve the Python
code quality.
Rewrite font builder tool to be much simpler and to support more text
effects.
Change GUI to use new set of fonts.
Switch font textures from TGA to PNG so they're easier for the font
builder to create.
Support RGBA font textures (for e.g. stroked text).
Greatly improve text rendering performance by using vertex arrays.
Fix rendering code leaving vertex buffers bound.
Add 'clip' property to GUI text objects, to disable clipping when
rendering.
Delete part of unused console function registration system.
This was SVN commit r7595.
