chore: change Discussions to GitHub discussions

[hugo-sid]

What problem does this PR solve?

• change Discussions to GitHub discussions
• add documentation for adding new language

Is this PR adding a new feature?

No.

Is this PR related to any issue or discussion?

#142

PR Checklist

• I have verified that the code works as described/as intended.
• This change adds a social icon which has a permissive license to use it.
• This change does not include any external library/resources.
• This change does not include any unrelated scripts (e.g. bash and python scripts).
• I have enabled maintainer edits for this PR.

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud