Stub is updated to support recent design for Crud Generation

What's Changed

• Dev: Various fixes in the design upgrades by @nikhilbhatia22 in #30
• fix(design-admin): done minor corrections and updated the color-scheme of admin panel by @simi41098 in #31
• feat(roles-permission): implemented roles and permission on users and token model by @simi41098 in #32
• When a new crud is generated, the view stub is updated to support the most recent design. by @simi41098 in #33

Full Changelog: v2.0.0...v2.1.0