Extend docs with links

- add links to the docs
- add tools/sort_metadata to resort data

tools/sort_metadata.py

@@ -0,0 +1,9 @@
+import copy
+
+import otc_metadata.services
+from ruamel.yaml import YAML
+
+data = otc_metadata.services.Services()
+
+data._sort_data()
+data._rewrite_data()