[PM- 19438] emergency access docs (#5846)

* doc: adding readme and comments to code for emergency access feature.
* fix: renaming variable names to better match vocabulary around emergency access.

src/Core/Auth/Enums/EmergencyAccessType.cs

@@ -2,6 +2,12 @@
 
 public enum EmergencyAccessType : byte
 {
+    /// <summary>
+    /// Allows emergency contact to view the Grantor's data.
+    /// </summary>
     View = 0,
+    /// <summary>
+    /// Allows emergency contact to take over the Grantor's account by overwriting the Grantor's password.
+    /// </summary>
     Takeover = 1,
 }