Allow configuring parameters for Nunjucks

[dhruvkb]

🐞 Describe the bug

Currently some configuration options for Nunjucks are hardcoded into the action.

repo-file-sync-action/src/helpers.js

Line 8 in 27113d1

nunjucks.configure({ autoescape: true, trimBlocks: true, lstripBlocks: true })

These can be incompatible with the needs of a project. For example, in a YAML project, autoescape can cause single quotes (') to be replaced with HTML entity codes (').

📚 To reproduce

Use a template-based approach to write YAML containing single quotes.

💡 Expected behavior

Nunjucks should be configurable by setting some options on the action that are passed into the nunjucks.configure function.

🖼️ Screenshots

No response

⚙️ Environment

v1.18.0

📋 Additional context

I'd be happy to open a PR to resolve this.