GPS refactor & license text updates (#601)

- Split up `gps-generic-module` into:
  - `gps-generic-module` that contains only interfaces/configs/bindings (Apache license)
  - `gps-meshtastic-module` that contains an implementation (GPL license)
- Update `LICENSE.md` for changes, but also added clarifications
- Added licenses to directories where they were missing
- Changed license of some test projects from GPL to Apache.

Drivers/gps-generic-module/CMakeLists.txt

@@ -6,7 +6,6 @@ file(GLOB_RECURSE SOURCE_FILES "source/*.c*")
 
 tactility_add_module(gps-generic-module
     SRCS ${SOURCE_FILES}
-    PRIV_INCLUDE_DIRS private/
     INCLUDE_DIRS include/
     REQUIRES TactilityKernel gps-module minmea
 )