516eff0633
This basically changes how the xmodule static files are generated and consumed in order to separate the Xblock styles from general style files. Includes: * build: decople XModule style assets by using a custom webpack loader * build: move scss imports to its specific file * build: fix: add system dirs to theme lookup paths. (fixes attempt 1) * build: fix: use bootstrap variables instead of lms variables (fixes attempt 2) This is an amendment to #32188, which itself was an amendment to #32018. Addressing the issue https://github.com/openedx/edx-platform/issues/31624