chore(reame): add content to `readme.md`

[baimamboukar]

This pull request closes #98 by introducing several improvements to the project's README.md file

• Add banner for the weekly challenge repo
• Add Technologies badges
• Add few features
• Add Get Started basic instructions
• Add Contributing and License sections
• Add join slack channel action

[manwar]

@baimamboukar Thanks for the contributions. I noticed the Slack join link points to Open Food Facts?

[baimamboukar]

@baimamboukar Thanks for the contributions. I noticed the Slack join link points to Open Food Facts?

Hello @manwar Sorry It was a mistake... I copied it from the Outreachy page.

I just tried the second slack channel link. It seems to be expired already

Can you have a look at it ?

[manwar]

@baimamboukar Please try this:

https://join.slack.com/share/enQtNjc1MzQ1OTU1Mjc3NS1iMDFmMzNjMDFkN2U4Y2MwY2E1MWU4M2U1YmYxNWFjNmRiMDI4MDZjNTJjYWIwYmY0MDIxMTc4OWMyNWU0ZGI1

[baimamboukar]

Hello @manwar It is done, I updated the slack invitation link

Thanks for reviewing it ✨

[manwar]

Well done and congratulation on successful first pull request. @baimamboukar

Do you mind take a look at the new issues I created for Outreachy?

[baimamboukar]

Thanks @manwar ✨ Sure, I'm on it. Thanks for creating these issues 🤲🏾