fix(lib): remove @ in import for Storybook 9+

[louismaximepiton]

Description

Remove an @ in the import that causes:

X [ERROR] Could not resolve "@storybook/theming/create"

    node_modules/ods-storybook-theme/OrangeTheme.js:12:23:
      12 │ import { create } from '@storybook/theming/create';
         ╵                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~

  You can mark the path "@storybook/theming/create" as external to exclude it from the bundle, which
  will remove this error and leave the unresolved path in the bundle.

Error: Build failed with 1 error:
node_modules/ods-storybook-theme/OrangeTheme.js:12:23: ERROR: Could not resolve "@storybook/theming/create"
    at failureErrorWithLog (.\node_modules\esbuild\lib\main.js:1463:15)
    at .\node_modules\esbuild\lib\main.js:924:25
    at runOnEndCallbacks (.\node_modules\esbuild\lib\main.js:1303:45)
    at buildResponseToResult (.\node_modules\esbuild\lib\main.js:922:7)
    at .\node_modules\esbuild\lib\main.js:949:16
    at responseCallbacks.<computed> (.\node_modules\esbuild\lib\main.js:601:9)
    at handleIncomingPacket (.\node_modules\esbuild\lib\main.js:656:12)
    at Socket.readFromStdout (.\node_modules\esbuild\lib\main.js:579:7)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:559:12)

After the PR is merged

Maybe release a new version of the package compatible with Storybook 9+.

[vprothais]

I think we will have to make a v2 since it is not compatible with previous versions anymore. And we should update the compatibility table on the readme file