Add and refresh environment variables in project settings tab (#37)

* Create and use add environment variables gql client method

* Implement get environment variables method

* Display fetched environment variables

* Refactor create environment variables submit handler

* Use environment variables type from gql-client

* Add fixtures for project member

---------

Co-authored-by: neeraj <neeraj.rtly@gmail.com>

packages/backend/test/fixtures/project-members.json

@@ -2,11 +2,46 @@
   {
     "memberIndex": 1,
     "projectIndex": 0,
-    "permissions": ["View", "Edit"]
+    "permissions": ["View"]
   },
   {
     "memberIndex": 2,
     "projectIndex": 0,
     "permissions": ["View", "Edit"]
+  },
+  {
+    "memberIndex": 2,
+    "projectIndex": 1,
+    "permissions": ["View"]
+  },
+  {
+    "memberIndex": 0,
+    "projectIndex": 2,
+    "permissions": ["View"]
+  },
+  {
+    "memberIndex": 1,
+    "projectIndex": 2,
+    "permissions": ["View", "Edit"]
+  },
+  {
+    "memberIndex": 0,
+    "projectIndex": 3,
+    "permissions": ["View"]
+  },
+  {
+    "memberIndex": 2,
+    "projectIndex": 3,
+    "permissions": ["View", "Edit"]
+  },
+  {
+    "memberIndex": 1,
+    "projectIndex": 4,
+    "permissions": ["View"]
+  },
+  {
+    "memberIndex": 2,
+    "projectIndex": 4,
+    "permissions": ["View", "Edit"]
   }
 ]