feature-save-file

[hrgdavor]

demo: https://3d.hrg.hr/jscad/save/

like mentioned in https://github.com/hrgdavor/jscadui/issues/88#issuecomment-1906776094

feature to allow ctrl+s to save file from editors

basic flow is initally implemented for solo script in the editor,

• [x] first save opens dialog
• [x] subsequent save saves into the same file

more to do

• [x] change internal file name to the file name that dropped (single file)
• [x] dropped (single file) without save dialog
• [x] provide file name proposal
• [x] reset reference to file name after new script is loaded examples or other source
• [x] reset file entry list when example loaded after folder loaded
• [x] use file handle from drag and drop to save the same file
• [x] change internal file name to the file name that was selected

not caused here

• [x] refresh editor when file is changed on disk (change is seen in render result, but not in editor source)

https://github.com/hrgdavor/jscadui/assets/2480762/31bc8ea9-180d-488f-8c57-694bc8588156

[hrgdavor]

• Save a file from the browser, then edit the FILE locally. The code editor in the browser does not update.

ok, this is also fixed.

I am merging this as it seems to work ok.

currently file handling is done with mixed usage of old https://developer.mozilla.org/en-US/docs/Web/API/File_and_Directory_Entries_API and new https://developer.mozilla.org/en-US/docs/Web/API/File_System_API

I will open a new branch to refactor and see if drag drop and this save showSaveFilePicker can all be done using the new File_System_API