✨ Add package to generated assets, pt.2

[AlexV525]

What does this change?

Further updates to #401.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Make sure to open a GitHub issue as a bug/feature request before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
  • Ensure the tests (melos run test)
  • Ensure the analyzer and formatter pass (melos run format to automatically apply formatting)
• Appropriate docs were updated (if necessary)

[AlexV525]

cc @bramp

[codecov]

Codecov Report

Merging #439 (9115aa7) into main (76bd39e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #439   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files          20       20           
  Lines         698      700    +2     
=======================================
+ Hits          686      688    +2     
  Misses         12       12           

Files	Coverage Δ
packages/core/lib/generators/assets_generator.dart	98.15% <ø> (ø)
.../core/lib/generators/integrations/integration.dart	100.00% <ø> (ø)
...ib/generators/integrations/lottie_integration.dart	93.10% <100.00%> (+0.24%)	⬆️
...e/lib/generators/integrations/svg_integration.dart	100.00% <100.00%> (ø)