Re-structure the main server. Separate different route in different controllers

[Suvadip-sana]

Description

I create different controller for different routes like - user, admin, others, profile

Related Issues

Link any related issues using the format Fixes #issue_number. This helps to automatically close related issues when the PR is merged.

• Placeholder: "Fixes #423 "

Screenshots (if applicable)

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Checklist

Make sure to check off all the items before submitting. Mark with [x] if done.

• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] I am working on this issue under GSSOC

@Soujanya2004 Marge it. And don't forget to add all the labels as per ISSUE #423

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[Suvadip-sana]

[Suvadip-sana]

@Soujanya2004 marge it. I check all the route, that works fine. All of them.

Please verify it. Check it by your own after marge. If any ISSUE arrive related to any path that is not present before this PR marge then please raised ISSUE, And assign it to me, I would love to work all of the ISSUE that's caused by this, with my unintention mistake. Please raised ISSUE and assign me. If any non exist problem occure.

[Suvadip-sana]

@Soujanya2004 And take a note. If someone changes on app.js before marge this PR. Then that should cause of website crash. So look on to that.