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

src/Common/Game/T6/T6_Assets.h

@@ -838,7 +838,7 @@ namespace T6
         uint32_t valid : 1;
     };
 
-    enum MapType
+    enum MapType : unsigned char
     {
         MAPTYPE_NONE = 0x0,
         MAPTYPE_INVALID1 = 0x1,
@@ -900,7 +900,7 @@ namespace T6
     struct GfxImage
     {
         GfxTexture texture;
-        char mapType;
+        MapType mapType;
         char semantic;
         char category;
         bool delayLoadPixels;