Rewrite Parcel guide (#36411)

* Rewrite Parcel guide

* update to match latest webpack guide, add images

* eslint-skip

* Apply suggestions from code review

Co-authored-by: Julien Déramond <julien.deramond@orange.com>

* match parcel to webpack, share footer, consistent use of no ;

* Update site/content/docs/5.2/getting-started/parcel.md

Co-authored-by: Julien Déramond <julien.deramond@orange.com>

* edits from code review

* Add custom images

* add image compression action from blog

Co-authored-by: Julien Déramond <julien.deramond@orange.com>