Changed stack to backend (#6488)

* Changed stack to backend

* change stack to backend in index file

* List stacks in table

* Backends for project message

* Changed file names

* removed linter errors

* change file names from stack to backend

* changed table head color to green

* test method stack to backend

* changed file name

Author: svnsairam

src/commands/frameworks-backend-get.ts renamed to src/commands/frameworks-backends-get.ts

@@ -156,8 +156,8 @@ export function load(client: any): any {
     client.frameworks.backends = {};
     client.frameworks.backends.list = loadCommand("frameworks-backends-list");
     client.frameworks.backends.create = loadCommand("frameworks-backends-create");
-    client.frameworks.backends.create = loadCommand("frameworks-backends-get");
-    client.frameworks.backends.create = loadCommand("frameworks-backends-delete");
+    client.frameworks.backends.get = loadCommand("frameworks-backends-get");
+    client.frameworks.backends.delete = loadCommand("frameworks-backends-delete");
   }
   client.login = loadCommand("login");
   client.login.add = loadCommand("login-add");