escape Markdown bullets in morse conversion/deconversion output

[posimagi]

Description

render morse conversion output in fixed width, and escape Markdown bullets at the start of morse deconversion

Fixes #484

Type of change

• Bug fix

How has this been tested?

Tested string manipulation in a local Python instance. I currently have no way to test the generation of Discord embeds.

Checklist

• [x] Issue exists for PR
• [ ] Code reviewed by the author
• [ ] Code documented (comments or other documentation)
• [ ] Changes tested
• [ ] All tests pass (see DEVELOPING.md, if it exists)
• [x] CHANGELOG.md updated if needed
• [x] Informative commit messages
• [x] Descriptive PR title

[posimagi]

updated PR

[classabbyamp]

don't worry about the CI failure for the moment