exclude duplicate definitions from raymath

remove lies

*[*]opaque -> *opaque

Rewrite/fix demos

Signed-off-by: Autumn! <autumnull@posteo.net>

Convert *void to *opaque and c::schar to c::char

Signed-off-by: Autumn! <autumnull@posteo.net>

Add raylib.ha as dependency in Makefile

Signed-off-by: Autumn! <autumnull@posteo.net>

update for types::c

also get rid of c_bool, since we fixed that abi incompatibility

remove raymath from makefile

still need to dedupe things which i was planning to do at the time
that i added to the makefile but i didn't and forgot i did that

remove recursive deps from LIBS and add note to readme

they will always be wrong most of the time so it makes the most sense to make them user specified

update raylib/

use error assertion operator on strings::fromc

Makefile: generate raymath.ha

unmix mixup between green and blue

drop unused use

move heightmap to cmd/heightmap

add readme

move res/* to resources

add makefile rule for heightmap

add port of https://github.com/raysan5/raylib/blob/master/examples/models/models_heightmap.c

represent c arrays as *[*]type instead of *type