Create block: Code quality improvements for the block scaffolding (#1…

…9867)

* Create block: Code quality improvements for the block scaffolding

* Improve the strucutre and handling of templates
Props to @aduth for the proposal: #19773 (comment).

* Ensure that package-lock.json file is refreshed with the changes from master

* Docs: Add a note about version and help options

* Code style: Run Prettier formatting on the package files

* Create block: Align .editorconfig with Gutenberg settings

* Fix: Use the description provided to fill the `description` field in `package.json` file in ESNext template

* Fix: Ensure that values provided for slug and namespace get converted to lower case

* Fix: Simplify the logic for transforming slug to title

* Update packages/create-block/lib/templates.js

Co-Authored-By: Andrew Duthie <andrew@andrewduthie.com>

Co-authored-by: Andrew Duthie <andrew@andrewduthie.com>

.github/CODEOWNERS

@@ -38,6 +38,7 @@
 /packages/babel-plugin-makepot                  @ntwb @nerrad @ajitbohra
 /packages/babel-preset-default                  @youknowriad @gziolo @ntwb @nerrad @ajitbohra
 /packages/browserslist-config                   @gziolo @ntwb @nerrad @ajitbohra
+/packages/create-block                          @gziolo
 /packages/custom-templated-path-webpack-plugin  @ntwb @nerrad @ajitbohra
 /packages/docgen                                @nosolosw
 /packages/e2e-test-utils                        @gziolo @ntwb @nerrad @ajitbohra