- added optional context menu and special context menu shortcut to analyze images*
- remove some unused code

- replaced original color and shade detection with faster, generic library, also written by me

- rebuild the options dialog page
- added popup to select either selection, dom or viewport mode
- added floating-ui to handle viewport edges
- added copy buttons and hex values to the floating info window
- make DeltaE display optional
- optionally show ginifab shades
- improved firefox compatibility

* added improved permission request and notice

some updates to the code