RUN-2094: UI:Next: Project list with lazy loading

[smartinellibenedetti]

Is this a bugfix, or an enhancement? Please describe.
Convert project view (menu/home) to vue, replacing the table pagination with infinite scroll.

Functionality implemented:

• Add 'Enable next UI' checkbox on /menu/home (accessible via the theme selector);
• Add new gsp view (home.next.gsp) for rendering only vue UI;
• project search;
• project actions based on metadata permissions;
• combine table pagination with lazy loading;
• small UI fixes (search results message, accessibility);
• move logic to render firstRun and welcome message to vue (without ui-sockets);

TLDR (tech):

• Add metadata response to /projects endpoint;
• Add new project metadata component (for readme and motd);
• Add unit tests for new vue components;
• Add basic tests in selenium;
• Add new test in project controller;
• Adjust jest config to handle alias in the components;
• Remove redundant ProjectListPage (same functionality as HomePage) from functional tests;

What is not implemented in this PR:

• project activity column;
• project reports (enterprise);
• table view of only favorites (enterprise);

Describe the solution you've implemented

Additional context

Lighthouse report:
Before:

After:

Note: performance didn't have big gains as the main problem is some of the js files that haven't been deprecated yet.