Tygo for go->typescript type generation

backend/Makefile

@@ -118,3 +118,7 @@ uml: plantuml.jar
 install-just:
 	@echo "Installing just"
 	@curl --proto '=https' --tlsv1.2 -sSf https://just.systems/install.sh | bash -s -- --to /usr/local/bin
+
+.PHONY: types
+types:
+	tygo generate

backend/tygo.yaml

@@ -0,0 +1,9 @@
+packages:
+  - path: "ttime/internal/types"
+    output_path: "../frontend/src/Types/goTypes.ts"
+    type_mappings:
+      time.Time: "string /* RFC3339 */"
+      null.String: "null | string"
+      null.Bool: "null | boolean"
+      uuid.UUID: "string /* uuid */"
+      uuid.NullUUID: "null | string /* uuid */"