Feature/828 - Workspace and repositories search and filter refactor

[D-GopalKrishna]

Issue related - #828

Task description

Implementation for the search and filter by tags do the following:

1. First - Search the text in the search bar → This returns the list of workspaces/repos that have - either one or all - of the titles/summary/tags associated with them.
2. Then, search for the tags that are set from the filters. From the result in (1) above, we return only the ones that have the tags selected from here (2).

Tags are now searched from the search bar - for both Repositories and Workspace - if they match any tags. This implementation is now in BE. And has been removed from Workspace FE (where it was added to the tags argument to pass to BE).

After this implementation:

• The search and tags field works the same for both workspace and repos.
• Also, the tag bug is removed now = on each text stroke tag gets added to the tags filter.
• Repositories default per_page changed to 24 as well.

[filippomc]

Looks good to me, thanks @D-GopalKrishna!