Add compatibility note for torchgeo version in README.md

update version

update selector.ui

Update README.md to enhance tutorial section with community contributions

Update conf.py

add load/create shape files

refine the logic of rendering layers

recover the rendering of new created or existed layer

remove messagebox for loading files

Refactor vector layer type checks to ensure polygon geometry vector layer selection

Merge branch 'main' of https://github.com/coolzhao/Geo-SAM

update to avoid crush when the active polygon layer is deleted

Merge pull request #70 from coolzhao/docs

update to directly import from qgis.PyQt not PyQt5, getting ready for the upcoming QT6 version of QGIS

Add explanations for the 'undo' button