fix: 🐛 pull request slack notification syntax errors

[punkbit]

Why?

To fix pull request Slack notification GitHub workflow syntax errors, due to the unpredictability of user title and description characters. By introducing character escapes and utilisation of JSON to prevent YAML formatting possible issues, etc.

How?

• Create escape script
• Remove exit 1 when description is empty

Preview?

The following is from a playground/runtime

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Latest commit: 4863084

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[workflow-authentication-public]

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