Connect Adding and Removal of Gem Repo UI to CLI (#4729)

* Connect Adding and Removal of Gem Repo UI to CLI

Signed-off-by: nggieber <nggieber@amazon.com>

* Addressed PR feedback

Signed-off-by: nggieber <nggieber@amazon.com>

scripts/o3de/o3de/manifest.py

@@ -536,7 +536,8 @@ def get_repo_path(repo_uri: str, cache_folder: str = None) -> pathlib.Path:
     if not cache_folder:
         cache_folder = get_o3de_cache_folder()
 
-    repo_sha256 = hashlib.sha256(repo_uri.encode())
+    repo_manifest = f'{repo_uri}/repo.json'
+    repo_sha256 = hashlib.sha256(repo_manifest.encode())
     return cache_folder / str(repo_sha256.hexdigest() + '.json')
 
 def get_registered(engine_name: str = None,

scripts/o3de/o3de/repo.py

@@ -71,7 +71,7 @@ def process_add_o3de_repo(file_name: str or pathlib.Path,
         # Having a repo is also optional
         repo_list = []
         try:
-            repo_list.add(repo_data['repos'])
+            repo_list.append(repo_data['repos'])
         except KeyError:
             pass