refactor: architecture base

- Moved NodeCG context management to a dedicated context module.
- Introduced message handling utilities for better message listening and sending.
- Updated startgg integration to use new message handling methods.
- Removed deprecated replicant utilities and replaced them with a new structure.
- Refactored replicant imports in graphics components to align with new structure.
- Added new pack-related types and schemas for better type safety.
- Cleaned up unused files and consolidated pack configuration into a single module.
- Updated TypeScript configurations to reflect new directory structure.

schemas/downloadStates.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "additionalProperties": {
+    "type": "object",
+    "additionalProperties": false,
+    "properties": {
+      "status": {
+        "type": "string",
+        "enum": ["idle", "fetching-manifest", "downloading", "done", "error"]
+      },
+      "progress": {
+        "type": "number"
+      },
+      "error": {
+        "type": "string"
+      }
+    },
+    "required": ["status", "progress"]
+  },
+  "default": {}
+}