[SE-4] Adding feature to change week, go to next or previous week

[harxh-v]

Proposed changes

page=smgt_route&tab=route_list

• [ ] Small typo-mistakes in the page
• [ ] buttons to see routines for next week
• [ ] change the color style to an event on day [holiday:red, event:orange, default:default]

[GauriGA]

@iHRex Can you assign me this issue?

[harxh-v]

Hey @GauriGA

You have already been assigned the issue [BE-5], kindly share the screenshot before submitting a pull request. __ Regards HARSH V

[codebreaker3008]

Could you assign this to me