cl-repl

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- upgrade to ECL-26 / Qt6
- added 'libsqlite3.so' for Quicklisp
- query dialog (for input) now a small popup
- add button color settings *button-color*, *botton-text-color*, *button-opacity*, *cursor-color* (all meant for 'dark mode' colors)
- resizable editor window
- file exchange in local WiFi, see :h (help window) and command :w