feat!: custom amp styles

[farnabaz]

Change AMP module styling behavior

• From now on all styles (inline/link) will be removed from AMP pages.
• AMP page have their own custom CSS, the file is located in ~/assets/styles/amp-custom.css. When the CSS file is missing in the project, AMP pages will not have <style amp-custom> tag.
• The CSS path is customizable in nuxt.config

[codecov]

Codecov Report

Merging #206 (239aa28) into master (c39c47e) will decrease coverage by 1.37%.
The diff coverage is 69.23%.

@@            Coverage Diff             @@
##           master     #206      +/-   ##
==========================================
- Coverage   67.03%   65.66%   -1.38%     
==========================================
  Files           4        5       +1     
  Lines         179      166      -13     
  Branches       48       46       -2     
==========================================
- Hits          120      109      -11     
+ Misses         43       41       -2     
  Partials       16       16              

Impacted Files	Coverage Δ
lib/runtime/components.js	0.00% <0.00%> (ø)
lib/runtime/plugin.js	59.70% <50.00%> (ø)
lib/module.js	65.38% <100.00%> (-2.09%)	⬇️
lib/utils.js	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c39c47e...239aa28. Read the comment docs.