[TASK] Introducing LanguageItems in memory cache test (see coverage)
[TASK] Updating .gitignore (JetBRAINS PhpStorm)
[TASK] Automatic pageAsset rendering as feature

This commit brings back the statically configurable
brushes setting to allow integrator flexibility by
setting up TypoScript properly. Use the shipped static
TS template to gain brush discovery + automatic
page asset rendering.
[DOC] Updating documentation for useStaticBrushes TS setting + new static template