feat: add refresh-message-position option

[KasperAndersson]

#71

This pull request introduces a new feature that allows users to refresh the position of an existing comment in a pull request, ensuring it appears as the most recent comment. This is accomplished by adding a new boolean input parameter, refresh-message-position, throughout the codebase and updating the comment publishing logic accordingly.

New input parameter support:

• Added refresh-message-position as an optional boolean input in action.yml, with documentation in README.md explaining its purpose and default value. [1] [2]
• Updated the IActionInputs interface and input handling utilities to include the new refreshMessagePosition parameter, ensuring it is available throughout the application. [1] [2] [3]

Comment publishing logic:

• Modified the publishComment function in comments.ts to support refreshing the comment's position by deleting and recreating the comment if refreshMessagePosition is true, instead of just updating it. [1] [2]
• Updated all invocations of publishComment in main.ts to pass the new refreshMessagePosition parameter, so the feature is applied consistently. [1] [2]