drop PowerShell support

• drop PowerShell support
• fix a few bugs in main file
• update installers
• update README
• add MinGW support

v0.11.0

• refactored plugin loading mechanism (git-based)
• updated README, and moved README to this repo
• fix bugs raised by wrong import order
• fix bugs of compatibility on Windows

v0.9.0

• update shell styles
• normalize variable naming
• fix a few bugs
• update defaults
• update .condarc default
• update wezterm default
• rename ox-conan's alias as oxpcn
• add support for fish
• rename utility functions
• refactored ox-container
• update ox-brew, ox-git, ox-pueue, ox-node
• update ox-espanso, ox-jupyter
• add .gitignore default
• rearrange docs

debut

• installation on ubuntu
• installation on macos
• installation on windows