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/ObjWriting/Font/FontDumper.cpp.template

@@ -83,7 +83,7 @@ namespace
     }
 #endif
 
-    void CreateJsonFont(JsonFont& jFont, const Font_s& font)
+    void CreateCompiledJsonFont(JsonCompiledFont& jFont, const Font_s& font)
     {
         jFont.pixelHeight = font.pixelHeight;
         
@@ -125,7 +125,8 @@ namespace
         void Dump(const Font_s& font) const
         {
             JsonFont jFont;
-            CreateJsonFont(jFont, font);
+            jFont.font.emplace<JsonCompiledFont>();
+            CreateCompiledJsonFont(std::get<JsonCompiledFont>(jFont.font), font);
 
             ordered_json jRoot;
             jRoot["$schema"] = "http://openassettools.dev/schema/font.v1.json";