created a readme in swahili language

[the1Riddle]

Readme Translation To Swahili

As it was mentioned in issue #942 and #818
A translation is made for on the readme file from English to Swahili on the SWAHILI-SW.md .

Checklist:

• [x] I have read freeCodeCamp's contribution guidelines.
• [x] My pull request has a descriptive title (not a vague title like Update index.md)
• [x] My pull request targets the main branch of freeCodeCamp.

Closes #912 #942

I can affirm that this Swahili translation for the README file is ok as i have gone through it and if you're happy with how it looks, I'd be happy if you could merge it with the main branch. Please let me know if something is unsatisfying / not as wished, I'd be happy to edit it so it meets the requirements.

[the1Riddle]

Hello @erictleung , please checkout my PR

[ @Kevin7744 and @Njoxpy ] you can give your reviews on this.

Thanks y'all.

[Kevin7744]

Thanks @the1Riddle , hope the merge will happen.

[Njoxpy]

Cool