Authentication, Dashboard, Scans

[eshaan7]

• Authentication Service (Closes issue Authentication Service (Angular) #1)

• User can login, logout.
• Token is stored in localstorage and indexedDB.
• using Angular's HTTP-Interceptor to add the Authorization header in requests to backend.

• Dashboard with Table and Visualizations (Closes issue Dashboard (angular) #2)

• JobService.ts to fetch and save this data.
• UI to list all the jobs with filtering, sorting as well as search functionality. Along with various visualizations in form of pie charts. (preview)
• Tested the performance for large sets of data.
• Added trivial tips in UI of how and what the visualizations can be used for.

• Scanning Service (Closes issue Scanning Service (Angular) #3)

• Ability to request observable scan from angular client.
• Ability to request file scan from angular client.
• md5 hashing function for their respective values.
• User can apply existing tags (or create new tags) to scan requests with a ease-of-use popover.
• The last 10 scans requested by the current logged in user are stored in indexedDB and shown on the scan page.
• Custom validation is applied to the forms to concur with the backend. For example, according to error: 816 from The Django app: either you specify a list of requested analyzers or the 'run_all_available_analyzers' parameter, not both. error is shown, and submit button becomes disable.