Chore: add "type": "module" to all package.json files for better ESM support (rjsf-team#4547)

* Chore: add "type": "module" to all package.json files for better ESM support
To improve ESM support, the `package.json` files for all public repos were updated to add `type: module`
- Installed `tsx` in `package.json` as a dev dependency
- Replaced all `babel.config.js` files with `babel.config.json` since `jest` assumes `.js` files are ESM not CJS
- Replaced all `jest.config.js` files with` `jest.config.json` since `jest` assumes `.js` files are ESM not CJS
- In all `package.json` files where a replacer was compiled, renamed them to `.cjs` to since they are `commonjs`
  - Updated the `tsconfig.build.json` files to change the replace extension to `.cjs`
- Updated the `.gitignore` to ignore replacers with `.cjs` along with `.js`
- In `@rjsf/validator-ajv8` switched the `compileTestSchema.js` to `compileTestSchema.ts` to replace `require` with `import`
  - Used `tsx` to run the file rather than `node`
  - Also generated `.cjs` files rather than `.js` since they are `commonjs`
- In `@rjsf/shadcn` switched `build-css.js` to `build-css.ts`, replacing `require` with `import`
  - Used `tsx` to run the file rather than `node`
  - Also renamed `postcss.config.js` to `postcss.config.json`

* - Switched to cross-build safe `move-file-cli` rather than `mv`

* - Removed antd v4 support

* - Updated `CHANGELOG_v6.md`

Author: heath-freenome

CHANGELOG_v6.md

@@ -21,7 +21,10 @@ should change the heading of the (upcoming) version to include a major version b
 
 - BREAKING CHANGE: Refactored `ArrayFieldItemTemplate` to use the new `ArrayFieldItemButtonsTemplate`
 - Updated the `ArrayFieldTemplate`, `ObjectFieldTemplate`, and `WrapIfAdditionalTemplate` to a unique id using the `buttonId()` function and adding consistent marker classes
-- Implemented the `GridTemplate` component, adding it to the `templates` for the theme 
+- Implemented the `GridTemplate` component, adding it to the `templates` for the theme
+- BREAKING CHANGE: Removed support for version 4 of `antd`
+- Updated `ArrayFieldItemTemplate` to replace `Button.Group` with `Space.Compact` since `Button.Group` is deprecated in `antd` version 5
+- Upgraded to `@ant-design/icon@5`, fixing typing issues in `IconButton`
 
 ## @rjsf/chakra-ui