Add /settings endpoint, clean up README, make WorldDB U# impl easier/faster (#556)

* docs: Change readme

* feat: New /settings endpoint; Make U# implementation easier

To further avoid the 5 second string loading delay, developers are no longer required to use /init before getting data; Every data request endpoint will now initialize the world automatically and include a connection key in the response.

Changed the way debug init works; It should now work for all endpoints without extra checks by just returning the current world as wrld_12345.

New /settings endpoint allows the change of the allow_external_reads column in the database, but getting data is currently unimplemented.

Fix store request logging being... completely wrong.

* Update README.md

Co-authored-by: Tayou <31988415+TayouVR@users.noreply.github.com>

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Co-authored-by: Tayou <31988415+TayouVR@users.noreply.github.com>

WorldDataRequestResponse.cs

@@ -30,6 +30,8 @@ namespace VRCX
         /// <value></value>
         [JsonProperty("statusCode")]
         public int StatusCode { get; set; }
+        [JsonProperty("connectionKey")]
+        public string ConnectionKey { get; set; }
 
         public WorldDataRequestResponse(bool ok, string error, string data)
         {