Refactor: Remove VarInt type, replace with int32, and consolidate encoding/decoding logic

proto_generator/native_encoder.go

@@ -315,6 +315,11 @@ func RegistryEntryHolderEncoder(g *Generator, varToSet ast.Expr, dataRaw any, na
 	return
 }
 
+func VarIntEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
+	s = Stmts(Assign121(Ident("err"), Call(Selector("proto_base", "EncodeVarInt"), Ident("w"), varToSet)), IfErrNil())
+	return
+}
+
 func (g *Generator) RegisterEncoderNatives() {
 	g.EncoderNatives = map[string]FunctionGeneratorFunc{
 		"container": ContainerEncoder,
@@ -327,7 +332,7 @@ func (g *Generator) RegisterEncoderNatives() {
 		"bitfield":  BitFieldEncoder,
 
 		"void":            DefaultEncoder,
-		"varint":          DefaultEncoder,
+		"varint":          VarIntEncoder,
 		"anonymousNbt":    DefaultEncoder,
 		"anonOptionalNbt": DefaultEncoder, // I have no idea what the difference is between these two
 		"UUID":            UUIDEncoder,