[Request] Display Company Signup Request in Admin Side of Portal

[itsGyanendra]

Is your feature request related to a problem? Please describe.
The current process for company sign-up involves sending an email to spo@iitk.ac.in, followed by the OPC account manually adding the company to the HR table and then authenticating the request. This method is cumbersome and time-consuming due to the need for manual copy-pasting. Furthermore, there is a risk of emails being missed or sign-up requests being ignored.

Describe the solution you'd like
In addition to sending an email, an admin-side table should be available to display all sign-up requests. The verifier should map the HR email ID to the corresponding company in the master database. Once the mapping is complete, the sign-up request should be automatically removed, and the details should be inserted into the HR details of the mapped company. If the company is not present in the master database, the verifier should add the company manually. The verifier must provide manual authentication.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
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