enable table designer for table script in sql database project (#19237)

* add 'open in designer' to context menu of tables in sql projects

* fix tests

* Address comments

* enable table designer for sql database proj

* update label and issues on init

* vbump sts

* use promisified fs

* pr comments

Co-authored-by: Alan Ren <alanren@microsoft.com>

extensions/sql-database-projects/package.json

@@ -190,6 +190,11 @@
         "command": "sqlDatabaseProjects.convertToSdkStyleProject",
         "title": "%sqlDatabaseProjects.convertToSdkStyleProject%",
         "category": "%sqlDatabaseProjects.displayName%"
+      },
+      {
+        "command": "sqlDatabaseProjects.openInDesigner",
+        "title": "%sqlDatabaseProjects.openInDesigner%",
+        "category": "%sqlDatabaseProjects.displayName%"
       }
     ],
     "menus": {
@@ -305,6 +310,10 @@
         {
           "command": "sqlDatabaseProjects.convertToSdkStyleProject",
           "when": "false"
+        },
+        {
+          "command": "sqlDatabaseProjects.openInDesigner",
+          "when": "false"
         }
       ],
       "view/item/context": [
@@ -388,6 +397,11 @@
           "when": "view == dataworkspace.views.main && viewItem == databaseProject.itemType.file.externalStreamingJob",
           "group": "5_dbProjects_streamingJob"
         },
+        {
+          "command": "sqlDatabaseProjects.openInDesigner",
+          "when": "azdataAvailable && view == dataworkspace.views.main && viewItem == databaseProject.itemType.file.table && config.workbench.enablePreviewFeatures",
+          "group": "6_dbProjects_openInDesigner"
+        },
         {
           "command": "sqlDatabaseProjects.exclude",
           "when": "view == dataworkspace.views.main && viewItem == databaseProject.itemType.folder || viewItem =~ /^databaseProject.itemType.file/",