ci: add license check

[felangel]

Description

• ci: add license check
  • sample output for shorebird_cli: ✓ Retrieved 28 licenses from 28 packages of type: MIT (9), BSD-3-Clause (16), Apache-2.0 (2) and BSD-2-Clause (1). (1.8s)

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore
• 🧪 Tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (38e2fb3) to head (02aa588).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #2190   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          185       185           
  Lines         5758      5758           
=========================================
  Hits          5758      5758           

Flag	Coverage Δ
artifact_proxy	100.00% <ø> (ø)
discord_gcp_alerts	100.00% <ø> (ø)
jwt	100.00% <ø> (ø)
redis_client	100.00% <ø> (ø)
scoped_deps	100.00% <ø> (ø)
shorebird_code_push_client	100.00% <ø> (ø)
shorebird_code_push_protocol	100.00% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.