Allow custom Javascript files for specific page

[namnguyen20999]

Description

Extend issue #1808

Enhance the Page class by introducing a new property that allows each page to define and execute its own JavaScript logic. This will enable the Page class to handle page-specific behaviors dynamically.

Solution Proposed

Adding a property for Page class so that it could implement specfic JS script for specific page

Acceptance Criteria

• Ensure new code is unit tested, and check code coverage is at least 90%.
• Create related issue in taipy-doc for documentation and Release Notes.
• Check if a new demo could be provided based on this, or if legacy demos could be benefit from it.
• Ensure any change is well documented.

Code of Conduct

• I have checked the existing issues.
• I am willing to work on this issue (optional)