feat: implementation of users module of the admin dashboard (#29)

Co-authored-by: Anwarul Islam <anwaarulislaam@gmail.com>

packages/hoppscotch-sh-admin/src/helpers/backend/gql/mutations/InviteUserToSignIn.graphql

@@ -0,0 +1,5 @@
+mutation InviteUserToSignIn($inviteeEmail: String!) {
+  inviteUserToSignin(inviteeEmail: $inviteeEmail) {
+    inviteeEmail
+  }
+}

packages/hoppscotch-sh-admin/src/helpers/backend/gql/mutations/MakeUserAdmin.graphql

@@ -0,0 +1,3 @@
+mutation MakeUserAdmin($uid: String!) {
+  makeUserAdmin(userUID: $uid)
+}

packages/hoppscotch-sh-admin/src/helpers/backend/gql/mutations/UserInfo.graphql

@@ -0,0 +1,11 @@
+query UserInfo($uid: ID!) {
+  admin {
+    userInfo(userUid: $uid) {
+      uid
+      displayName
+      email
+      photoURL
+      createdOn
+    }
+  }
+}