* sdlada.toml: add C_INLCUDE_PATH on Windows msys2
* sdlada.toml: only compile tools on post-fetch
The other make file targets are not required.
Also define SDL_PLATFORM for all targets so we don't have to user a different post-fetch for each OS.
* sdlada.toml: remove SDL_MODE definition
This means the users of the lib can define the build mode they want.
* libsdl2*.toml: add msys2 package
* ada_voxel_space_demo.toml: set sdlada build mode
* Migrated to 0.4 manifest version
Co-authored-by: Fabien Chouteau <fabien.chouteau@gmail.com>
Also applied the rest of transformations described in alire#227: no top-level
[genera] table, name/version keys, [[depends-on]] array instead of table.