feat: implement deprecated flag for templates to prevent new workspaces (#10745)

* feat: implement deprecated flag for templates to prevent new workspaces
* Add deprecated filter to template fetching
* Add deprecated to template table
* Add deprecated notice to template page
* Add ui to deprecate a template

coderd/apidoc/docs.go

@@ -10057,6 +10057,12 @@ const docTemplate = `{
                 "default_ttl_ms": {
                     "type": "integer"
                 },
+                "deprecated": {
+                    "type": "boolean"
+                },
+                "deprecation_message": {
+                    "type": "string"
+                },
                 "description": {
                     "type": "string"
                 },

coderd/apidoc/swagger.json

@@ -9085,6 +9085,12 @@
         "default_ttl_ms": {
           "type": "integer"
         },
+        "deprecated": {
+          "type": "boolean"
+        },
+        "deprecation_message": {
+          "type": "string"
+        },
         "description": {
           "type": "string"
         },