Add squared actor posters section to README

Added section for squared actor posters with details on enhancement and usage.

Update theme version to 01.13 and adjust styles

Fixes TV series cards displaying with inconsistent padding between Next Up & Series cards

Remove gradient overlay from media bar

Removed the gradient overlay from media bar content.

Enhance headerTop with blur gradient effect

Added a blur gradient effect to the headerTop element and adjusted padding.

Update GlassFin Theme version to 01.09

Update GlassFin-Theme-latest-stable.css

Rename GlassFin-Theme-V01.08 to GlassFin-Theme-V01.08.css

Update GlassFin-Theme-V01.06.css

Refer to release notes

Rename ExpandEpisodeWriteUp.txt to ExpandEpisodeWriteUp.js

Update README.md

Updated GlassFin import url to reflect v01.04