add types and decouple packs functions from flask

src/type/pack.py

@@ -0,0 +1,38 @@
+import json
+from .mod import Mod
+
+
+class Pack:
+    def __init__(
+        self,
+        _id: str,
+        title: str,
+        author: str,
+        version: str,
+        modloader: str,
+        updateURL: str,
+        mods: list[Mod],
+        modpackVersion: int = 0,
+        formatVersion: int = 0,
+    ):
+        self._id = _id
+        self.title = title
+        self.author = author
+        self.version = version
+        self.modloader = modloader
+        self.updateURL = updateURL
+        self.mods = mods
+        self.modpackVersion = modpackVersion
+        self.formatVersion = formatVersion
+
+    def json(self):
+        return {
+            "title": self.title,
+            "author": self.author,
+            "version": self.version,
+            "modloader": self.modloader,
+            "updateURL": self.updateURL,
+            "mods": self.mods,
+            "modpackVersion": self.modpackVersion,
+            "formatVersion": self.formatVersion,
+        }