* Blockbase: Simplify our approach to font customization
* remove commented code
* Handle fonts that are customized the old way
* add comments
* update all child themes to use the new font customization settings
* Add a comment about this being a breaking change
* Add a notice when a user has an old version of blockbase
* Updated build process to merge ALL attributes (as Gutenberg does) and re-defined the now missing custom templates items in the themes that would now lack them
* removed the build step tooling from blockbase
* converted build tool to a 'replacement tool'
* Removed build scripting from children package files
* Removed build scripting from children package files
* Run the script to remove child-theme.json files
* Update the version number and changelog for Blockbase
* Remove the rebuild script, we don't need it anymore
Co-authored-by: Ben Dwyer <ben@scruffian.com>
