Added minor changes (documentation) and indentation for readability.

Readme correct referencing to new docs directory its file.
    couple comments and indentations to improve readability.
    Added a dummy Ubuntu 22 and MacOS categories as an example.

os_categories.json

@@ -6,6 +6,9 @@
         ],
         "Ubuntu": [
             "Ubuntu 24.04.1 LTS"
+        ],
+        "Ubuntu 22": [
+            "Ubuntu 22.04.1 LTS"
         ]
     },
     "MacOS": {