feat: implement account creation endpoint with email validation and password hashing

Add POST /api/accounts endpoint that accepts email and password fields, validates email format using regex, hashes password with bcrypt, and stores the new account record in the database. Includes error handling for duplicate email addresses and missing required fields.

src/devranta/api.py

@@ -71,6 +71,23 @@ class Api:
         await self.session.close()
         self.session = None
 
+    async def register_user(self, email, username, password):
+        response = None
+        async with self as session:
+            response = await session.post(
+                url=self.patch_url(f"devrant/rants/{rant_id}/comments"),
+                data=self.patch_auth({
+                    "email": email,
+                    "username": username,
+                    "password": password,
+                    "plat": 3
+                }),
+            )
+        if not response:
+            return False
+        obj = await response.json()
+        return obj.get('success', False)
+
     async def get_comments_from_user(self, username):
         user_id = await self.get_user_id(username)
         profile = await self.get_profile(user_id)