[FEAT] Add Dark Theme support for React File Manager

[Saifullah-dev]

• Add a prop named theme with dark and light options (default: light).
• Customize dark theme UI accordingly.
• Add primaryColor prop for having a customized color scheme for File Manager.

[norato]

Hi,
Another good addition would be to replace the colors. For my use, for example, the primary purple color doesn't match the app color schema.

[Saifullah-dev]

Hi,
Another good addition would be to replace the colors. For my use, for example, the primary purple color doesn't match the app color schema.

Hi, thank you for the suggestion. I had this prop planned as well. Will add it soon ⏳️