[FEATURE]: Implement basic dashboard with Home page and navigation

[DeveloperAmrit]

Feature and its Use Cases

• Using this doc file - https://docs.google.com/document/d/1PeDt2NFrdcuwHvl2--It8ERM-BJAhrr9Igsp2bzRqaI/edit?usp=sharing
• Implement minimalistic professional design for the Home page and navigation.

Pages

1. Home page: recent activity, mentions,
2. Organization page: heat map, most active repos, recent issues (org level), recent PRs,
3. Projects page: repos, recent issues, recent PRs, last activity, maintainers, contributors, etc.
4. Discovery page: Natural language search, topic clustering
5. Governance page: dead issues, zombie PRs, repos heavily dependent on two contributors, license and security audit, etc.

Other pages

1. Repo-specific page: Navigatable from the projects page by clicking on a repo title
2. Profile page - View/Change your role, accounts associated, publicly viewable information

Home page features

Your recent GitHub activities

• Created issue X on repo Y
• Opened PR X on repo Y
• Merged PR X on repo Y from Z
• Assigned issue x on repo Y to Z
• Commented X on conversation Y
• Created repo X
• Reviewed PR X on repo Y from Z

Mentions

• Show mentions in the last 24 hrs. in GitHub and Discord
• If you visited that mention, or the mention has a reply from you, mark it done.
• Mentions format: platform - author - type(issue/PR/message) - title - status
• You can click the mention to directly visit it

Your issues

• Shows Issues created/assigned
• Filter based on created/assigned, time window, keyword, PR raised or not, repo

Your PRs

• Shows PRs opened
• Filter based on reviewed, time window, keyword, connected to issue or not, repo
• Option to export as JSON, readme, .txt, etc.

Contributions

• Shows PRs merged
• Filter based on time window, repo
• Option to export as JSON, readme, .txt, etc.

Maintainer activity

• Shows PR reviews, issue comments

User heat map

• Same as heatmap in GitHub profile
• Comes with the following options
  • No. of Issues created on that day
  • No. of PRs opened on that day
  • No. of Issues assigned on that day
  • No. of PRs merged on that day

Additional Context

No response

Code of Conduct

• I have joined the Discord server and will post updates there
• I have searched existing issues to avoid duplicates