Kyaah

Improve api design

- Fixed api(s) for retrieving sender credentials from environment variable
- Include the `aiosmtpd` library as kyaah dependency for testing mail locally
- Revised local smtp server. Since `The asyncore module is deprecated and will be removed in Python 3.12. The recommended replacement is asyncio import asyncore` by implementing cli command for starting local SMTP server

- Update CHANGELOG version of release (mistake of previous release v0.1.14 i.e `(*/august/2024)` to `(21/july/2024)`)

- Changed naming convention of functions in `camelCase` to `snake_case`. Also making sure all other class are in `PascalCase`
- Implemented a single `send` function for all general sending mail operations (plain, file, image, & page), which replace previous ones:
- `local_mail`, `send_mail`, `send_images`, `send_files`, and `send_page`
- Implemented a single `fetch` function for fetching mail (POP & IMAP), which replace previous ones:
- `fetch_mail_POP`, and `fetch_mail_IMAP`
- Internal arrangement suggestion/guess of mail server
- Fixed mail with page, to ensure it send content of the page not the page itself

- Add character style print (text & logging style)
- Add POP and IMAP
- Improve files naming slices
- Include email link (with expiration age)
- Changed the a required module of 'pstyle' to 'rgbpy'

Docs