ENH: add entity getters and cached functions

Summary

For #167 (closed) Insert a meaningful description for this merge request here: What is the new/changed behavior? Which bug has been fixed? Are there related issues?

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src/caosdb/common/administration.py

@@ -385,7 +385,7 @@ action : str
     Either "grant" or "deny"
 
 permission : str
-    For example "RETRIEVE:*".
+    For example ``RETRIEVE:*``.
 
 priority : bool, optional
     Whether the priority shall be set, defaults is False.