Assign ownership to many libs files (#6928)

Assign ownership to many of the remaining libs/common files.

Criteria for ownership:
* Files used by a single team, is now owned by that team.
* Files related to a domain owned by a team is now owned by that team.
* Where ownership is unclear the "lowest level" service takes ownership.

libs/common/src/platform/enums/hash-purpose.enum.ts

@@ -0,0 +1,4 @@
+export enum HashPurpose {
+  ServerAuthorization = 1,
+  LocalAuthorization = 2,
+}