Enabled 'recolor-keephue' to prevent documents from becoming purely monochrome
when recolor mode is active. This ensures images and colored text retain their
hue while still adapting brightness for the theme.
- Updated 'extraConfig' to use an absolute path for the 'zathura-matugen'
include, fixing path resolution issues.
- Added a home activation script to create an empty 'zathura-matugen' file
if it doesn't exist, preventing zathura from crashing on fresh installs
before matugen has run.