feat(babel): new way for detecting tags imports

[Anber]

Motivation

@linaria/atomic introduced the new pair of tags with their processing logic. It increased the complexity of babel-preset.

Another point is adding an ability to process already transpilled files.

Summary

In this PR, I changed the way how template tags are detected and resolved:

• there are no more hardcoded packages and tags names;
• if the package imports a tag that can be processed by Linaria, its package.json should have linaria.tags section with a list of imported tags and links to processors that encapsulates all logic for processing those tags;

"linaria": {
  "tags": {
    "css": "./lib/processors/css.js",
    "styled": "./lib/processors/styled.js"
  }
},

• in addition to import … from …, this PR introduces support for transpilled imports, so it's become possible to use pure tsc compiler + @linaria/cli for post-processing and extracting styles from compiled code.

Test plan

A bunch of tests were added.

[callstack-bot]

Hey @Anber, thank you for your pull request 🤗.
The coverage report for this branch can be viewed here.

[ntucker]

FYI: this upgrades loader-utils but doesn't migrate the usage of it based on breaking changes. See #977

[Anber]

Ooops. Thank you!