Filter issue list by project

[xunker]

Adds option to filter issue list by project with lc issues list --project <identifier>:

$ lc issues list --no-mine --project "https://linear.app/myorg/project/test-proj-fe9940e559f4"
PRO-4        Test 3 - estimate
PRO-2        Test 1 - Estimate

Also does:

• allows projects to be identified by URL or ID, too:
  • ls issues list ---project "https://linear.app/myorg/project/my-project-a2d0ddbbfbeb"
  • ls issues list ---project 59a16a32-3733-41c9-a5bc-13ef91a940e7
• methods to query projects moved to CLI::Projects (linear-cli/lib/linear/cli/projects.rb) so they can be shared with CLI::WhatFor so it will also benefit from the new finders
• adds basic rspec example for testing Linear::Project#match_score? changes

[bougyman]

Thanks for this one, it's been on my todo list!

[bougyman]

Can you remove the Gemfile.lock? I probably never should have committed it, really doesn't belong in a gemmed cli, don't you think?