Add gb-starter-kit to test suite

[ISSOtm]

• gb-boilerplate + gb-starter-kit

  See Some ASM templates do not compile anymore awesome-gbdev#208 for context. This would additionally imply moving them to the gbdev org, so that others than myself have access. (I guess rights should be given to the rednex team, too.)

• SameBoot

[avivace]

Nice, having them tested in the CI allows those entries to stay consistent and relevant. Thank you

[Rangi42]

gb-starter-kit has two FAILs in src/header.asm for when configuration is needed, which would have to become conditional, like MACRO must_configure / IF !DEF(TEST_RGBDS) / FAIL \1 / ENDC / ENDM and pass rgbasm -D TEST_RGBDS.

[ISSOtm]

For some reason, gb-starter-kit fails to build on macOS and Windows, even with parallel build disabled. This debug output puzzles me:

  Prerequisite `res/crash_font.1bpp.pb8.size' is newer than target `dep/crash_handler.mk'.
 No need to remake target `dep/crash_handler.mk'.