PidCat: allar útgáfur og eldri útgáfur

🚀 Features
- (dc757f) Added option to show PID of running package(s)
🐛 Bug Fixes
- (3961be) (build.py) Fix issue with build-executable command
⚡ Performance Improvements
- (bd3d31) Mild performance improvements
♻️ Refactors
- (b8e654) Refactor code to use MVC architecture
- (2f8a3b) Code refactoring and bug fixes
- (382c99) (build) Code refactoring and improvements
- (511412) Code refactoring and performance improvements
- (a13777) Code refactoring and improvements
🎨 Code Style
- (155809) (Justfile) Reformat Justfile
- (9226eb) Change code style to use snake_case
📚 Documentation
- (e1dd90) Updated readme
- (c2e998) Add winget URL to readme
🛠️ Maintenance
- (66f6aa) Add Justfile to manage builds
- (9e9d94) Use Just to build the executable in github actions
- (3c9c53) (build.py) Refactor build script argparse
- (9975de) (Justfile) Update Justfile to use the new buildscript
- (f29e66) New app icon
- (3acff5) Use git-cliff for changelog generation
- (984565) (cliff.toml) Remove body template from cliff.toml
- (3444a4) (cliff) Add commit hash to changelog
- (54931c) Make build.py a package so it can be run as a module

- added option to filter out known system tags
- added multiple package capturing in --current option
- updated build script docs
- updated changelog_config.json