* Lossless image optimization (using ImageOptim).
This shouldn't change the visual appearance of any images. ImageOptim
was run with the highest compression setting except that JPEG metadata
stripping was disabled because some users prefer to avoid stripping
JPEG metadata.
* Update READMEs that have Changelogs for themes impacted by lossless image optmization change.
* Spearhead Blocks refactored Initial Commit
Refactored commit of Spearhead Blocks, now being a clone of Block Canvas, instead of child of Blockbase
* Review updates
- removal of ref id from header template
- dark mode editor style added
- unused tertiary color removed from the palette
- screenshot added
* Fixes to Theme.json and Footer Template
This commit fixes the issues mentioned in the PR
- Footer template now has the site title in it
- Block spacing and font weight fixes
