ci: automatically sync generateContents.js to CoA-schemas and EN10168-schemas

[eamon0989]

Description

When the PDF generator is updated currently, the minified code that is generated needs to be manually copy-pasted over to the CoA-schemas and EM10168-schemas repositories. This PR automates both of those tasks using https://github.com/Redocly/repo-file-sync-action.
It watches the generateContent.js file in the /dist folders and when those files are updated and pushed to main, it automatically opens PRs on the target repositories with the updated code.

Fixes #146

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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