Add Localisation Support

[mr-vara]

Proposed changes

Important: I am currently working on adding translations to the modules as part of this EPIC: https://jira.newfold.com/browse/PRESS11-144. My primary focus is on integrating translations and setting up the automation workflow.
As part of this effort, I am adding the essential components required to load text domains and register translation paths for both PHP strings and JS scripts.
Please feel free to build upon this work, particularly in terms of fully handling the loading of translations within the module.

This pull request adds translation and localization support to the WordPress Help Center module. All user-facing text strings have been updated using WordPress internationalization (i18n) functions, ensuring that the module can be translated into various languages. This update improves accessibility and usability for a global audience, adhering to WordPress localization standards.

Key changes include:

• Implemented WordPress i18n functions (__(), _e(), etc.) across all strings.
• Added a .pot file for translation string management.
• Updated plugin files to enable smooth and consistent localization.

With this enhancement, the Help Center module can be translated into multiple languages, offering better support to non-English speaking users and broadening its usability.

[wpscholar]

Let's also add a workflow for our linting

[ajayadav09]

@mr-vara @circlecube Updated the PR with a few changes for the JS translations to load. Please go through them.

[abhijitb]

Tested is locally for the Spanish and French languages ... attaching screenshots ... looks good