This change resizes thumbnails to the appropriate width
based on the value of mw.popups.gateway.THUMBNAIL_SIZE
Tests cover
* When requested thumbnail is < than original size
* When requested thumbnail is > than original size
* When requested thumbnail is an svg and originalimage
smaller than requested thumb size
Bug: T156800
Change-Id: Ib375b97e2bc959e91de5177efc3df1f2ded54a5b
This way, src contains sources, and dist contains distribution files.
Also, add some documentation about the folders in the README and an adr.
Change-Id: Ie0b9f6475b8423b90e927633d883bde3cd5d5e4d