wasm: support vendor:stb/truetype and vendor:fontstash

vendor/fontstash/fontstash_os.odin

@@ -0,0 +1,20 @@
+//+build !js
+package fontstash
+
+import "core:log"
+import "core:os"
+
+AddFontPath :: proc(
+	ctx: ^FontContext,
+	name: string,
+	path: string,
+) -> int {
+	data, ok := os.read_entire_file(path)
+
+	if !ok {
+		log.panicf("FONT: failed to read font at %s", path)
+	}
+
+	return AddFontMem(ctx, name, data, true)
+}
+