fix(CldVideoPlayer): add event listener to 'astro:page-load' instead of 'load' to ensure Client Router / View Transitions compatibility

[jhb-dev]

Description

This PR adjusts the CldVideoPlayer to add an event listener to astro:page-load instead of load to ensure the video player is also initialized when navigating to a page via the ClientRouter (View Transitions).

Issue Ticket Number

Fixes #90

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Fix or improve the documentation
• This change requires a documentation update

Checklist

• I have followed the contributing guidelines of this project as mentioned in CONTRIBUTING.md
• I have created an issue ticket for this PR
• I have checked to ensure there aren't other open Pull Requests for the same update/change?
• I have performed a self-review of my own code
• I have run tests locally to ensure they all pass
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes needed to the documentation

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