feat: font generation from ttf (#882)

* chore: add file variant of json fonts

* chore: add stb dependency

* feat: generate fonts from ttf files

* chore: add option to add yOffset to file font

* chore: dynamically adjust generated font bitmap size

* fix: printable characters should respect ISO-8859-1 control characters

* chore: do not write missing glyphs into the bitmap

* chore: remove test texture conversion

* chore: adjust font compiler for iw3,iw4,iw5,t4,t5

* chore: add possibility to fill color channels when converting

* fix: games other than t6 use rgba for fonts

* fix: make sure no mipmaps are set on loaddef

* fix: t4 and iw3 use dimensions in image loaddef

* chore: also include optional glyphs in fonts

premake5.lua

@@ -100,6 +100,7 @@ include "thirdparty/json.lua"
 include "thirdparty/minilzo.lua"
 include "thirdparty/minizip.lua"
 include "thirdparty/salsa20.lua"
+include "thirdparty/stb.lua"
 include "thirdparty/webwindowed.lua"
 include "thirdparty/zlib.lua"
 
@@ -115,6 +116,7 @@ group "ThirdParty"
     minilzo:project()
     minizip:project()
     salsa20:project()
+    stb:project()
     zlib:project()
     
     if _OPTIONS["modman"] then