Fenv

- [x] `fenv uninstall <package>` can remove packages and package dependencies all in one Tested [Windows]
- before 
- after 
- [x] Add command `fenv clean` to clean packages left lib basic files pass test [Windows] and [Linux] 
- [x] Added fev.cfg file
- [x] Support command all in Linux

- [x] Fix bug create readme.md change `env_directory()` to `name`

- [x] Added Tree path in md after generating projects , can you try command `fenv update` 
- [x] Added create file .gitignore
- [x] Edit readme.md small changes
- [x] Fix if an `env` folder does not exist, the modified `fenv install <packages>` command will prompt you to confirm whether you would like to create a new `env`. If you choose not to create a new `env`, the installation will proceed using `python main` 
- [x] Added command `fenv install` alone will install file requirements.txt in directory current 
- [x] Added after use `fenv onlyenv` created settings then activate env one time 

- [x] Fix bugs small

- [x] Fix bugs settings in .vscode
- [x] Fix bugs line 609 and 624

- [x] Fix bugs small