Feat/notebookendpoints (#862)

* Added endpoint for fetching all notebook jobs

* Refractored NotebookJobInfo to AgentNotebookInfo to make it more consistent with the rest of the codebase

* Added Notebook History endpoint in contracts.

* Added Create, Update, Delete notebook endpoints. Also added separate fetch template, materialized notebook endpoints. This will make the Notebook Request and Notebook History responses lighter.

* AgentNotebookInfo is now derived from AgentJobInfo

* added fetch noteook history endpoint

* Added fetching materialized notebook endpoint

* Added code for cleaning up the directory

* Added create notebook api

* Added Update and delete notebook job

* Fixed notebook history API

* Added last run info to the script and template folder

* Added execute database feature for notebook Jobs

* SQL commands are now using sqlparameters to prevent
any injection attacks

* Changed rundate and runtime to string to preserve
leading zeros

* integration test for agentnotebooks api

* Made some changes mentioned in PR

* Refactored the code, removed enpoint logic from the notebook handler and
wrote test cases

* changes select statements, fixed a bug in the test job cleanup
and fixed other stuff mentioned in the PR.

* added notebook_error column in notebook history select statement

* Added get template notebook endpoint

* Added renaming and pinning notebook runs

* made tables names caps to handle servers with case sensitive queries

* made some changes to the enpoint points paths

* Added delete materialized notebooks endpoints

* Fixed a bug in delete, rename and pin apis where
requests from multiple clients with materializedID = 0
could have resulted in multiple rows getting created
on notebooks.nb_materialized table.

* fixed a merge conflict

* Made some changes mentioned in the PR

* modified a query to handle space sensitive databases

* Made some changes mentioned in the PR

* fixed a small query bug

src/Microsoft.SqlTools.ServiceLayer/Agent/AgentService.cs

@@ -1470,7 +1470,7 @@ namespace Microsoft.SqlTools.ServiceLayer.Agent
             });
         }
 
-        internal async Task HandleDeleteNotebookMaterializedRequest(DeleteNotebookMaterializedParams parameters, RequestContext<ResultStatus> requestContext)
+        internal async Task HandleDeleteNotebookMaterializedRequest(DeleteMaterializedNotebookParams parameters, RequestContext<ResultStatus> requestContext)
         {
             await Task.Run(async () =>
             {