Pwy

- Changed license from GPLv3 to [MIT](./LICENSE).
- Added MIT License notice to source code files
- Added requirements.txt
- Removed unused codes
- Implemented comprehensions
- Formatted with autopep8
- Added .vscode settings

- [Windows] Fixed typo in pwy/cli.py 13 (patevs).

- Fixed KeyError in cli.py
- Added default value when configuring unit and language for `pwy.json`.

- Replaced `pwyrc` with `pwy.json`.
- pwy.json
- Set OWM API key.
- Set default location.
- Set default unit.
- Set default language.
- Ability to display weather using the `pwy` command.
- pwy reads the values set in the pwy.json file.
- If there is/are arguments, `pwy` will satisfy the arguments.
- Minor code cleanup.

- Implemented rich.
- Replaced colours.py with rich library.
- Removed colours.py.
- Formatted using black module.
- Minor code cleanup

- Added default value to the arguments and removed the unnecessary if else.
- Removed the unnecessary f-strings
- Added `sys.exit(1)`.
- Moved `.pwyrc` to `~/.config/pwyrc` (in Unix-like OS).
- Minor code refactor.