[Feature] GitHub Search integration enabling users to search for Issues and Pull Request

[samad-yar-khan]

Why do we need this ?

As a GitHub App developer

I need to: Add a search feature which enables users to query issues and pull requests

So That: users can search for relevant Pull Requests and Issues right from Rocket.Chat and share them in the desired channel, enhancing the communication and collaboration between developers.

Acceptance Criteria

• [ ] Enable user to trigger a search modal using /github search.
• [ ] Enable user to enter search queries and fetch relevant results.
• [ ] User Should be able to view and select the relevant search results in a another search view modal.
• [ ] Users should be able to send selected search result in the desired room.
• [ ] Add documentation to the wiki for the GitHub search mechanism and user-flow
• [ ] Handle non authenticated users edge cases. (GitHub Search API requires OAuth Token)

Further Comments / Referances

• GSoC Proposal mentioned the search result to be fetched directly in chat but viewing them in a modal and sending relevant results to the channels seems like a better user experience.
• Wireframes for the Search Modal Mentioned in the Google Summer of Code Proposal :