Adding the functionality to copy the symbology raster and SVG to a relative given path

[SeqLaz]

Task QF-1844

SVG_Raster_embedded_on_project.webm

[gounux]

Thank you @SeqLaz ! Did not tried it on my local yet, left a few formalism comments.

[SeqLaz]

In the last commit I did many improvements (thanks for the suggestions @gounux, @suricactus).

• Move the function for update_symbols_path_assets outside the function update_symbols_to_project_assets.
• Change the try ... except block for an if statement thanks to the Path.is_relative_to() method.
• Removing the recursion in the function update_symbols_path_assets not needed since the QgsRuleBasedRenderer have the method symbols() which return a List with all the symbols even nested one.

[gounux]

After having tested, I can confirm that the icons are well copied to the export folder, and that the new project's symbologies are well configured !

[SeqLaz]

Hey @suricactus and @gounux in the last commit I added all the suggestions, thanks for it.

Also changed the logic from copy the files to assets to embed the symbology in the projects. See the new video in the description.

[gounux]

Had the opportunity to test again, indeed the symbols are now embedded in the QGIS project for QField!

Thanks @SeqLaz, nice work!

[suricactus]

Thanks!