* 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.
* Add Jaida theme for review
* remove theme attribute from the template part definitions
* remove queryId from the templates
* move 404 content to pattern
* move footer content to pattern
* move comments block to pattern
* remove empty height attribute on spacer block
* update theme and min wp versions
* add theme uri
* remove invlid blocks and styles
* fix search page and update footer social links
* update license information and remove unused assets
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Co-authored-by: madhusudhand <madhusudhan.dollu@gmail.com>
