added functionality to delete existing partitions before reinstall

examples/archinstall/.gitignore

@@ -1,42 +0,0 @@
-**/**__pycache__
-SAFETY_LOCK
-**/**old.*
-**/**.img
-**/**pwfile
-**/**build
-**/**dist
-**/**.egg*
-**/**.sh
-!archinstall/locales/locales_generator.sh
-**/**.egg-info/
-**/**build/
-**/**src/
-**/**pkg/
-**/**dist/
-**/**archinstall.build/
-**/**archinstall-v*/
-**/**.pkg.*.xz
-**/**archinstall-*.tar.gz
-**/**.zst
-**/**.network
-**/**.target
-**/**.qcow2
-**/**.log
-**/**.fd
-/test*.py
-**/archiso
-/guided.py
-venv
-.venv
-.idea/**
-**/install.log
-.DS_Store
-**/cmd_history.txt
-**/*.*~
-/*.sig
-/*.json
-requirements.txt
-/.gitconfig
-/actions-runner
-/cmd_output.txt
-uv.lock