Added the ability to patch themes locally to fix the gamelist layout bugs in themes, surfaced after EmulationStation's fixes for positioning, added a in 2.10.x.
Mostly done to fix @ruckage's themes, which haven't been updated after the new EmulationStation version.
Fixes included:
* for the 'snes-mini' theme, based on https://github.com/ruckage/es-theme-snes-mini/pull/26, submitted by @makofee
* for the 'nes-mini' theme, started from https://github.com/ruckage/es-theme-nes-mini/pulls/13, submitted by @grosa1, which in turn is based on https://retropie.org.uk/forum/topic/12583/snes-mini-theme/929?_=1699852993853 (?). Followed by some testing and fixing for the other resolutions which are not covered by the initial changes.
* for the 'famicom-mini' theme, adapted from the previous patch with some adjustments added after testing each resolution supported.
