Create th.yaml

[ppnplus]

What does this PR change? What problem does it solve?
I've added a new translation file, which adds support for Thai language (th). All strings from the English version have been translated.

Was the change discussed in an issue or in the Discussions before?
I've checked both tabs, both open and closed issues/discussions, for "Thai" and "ไทย" (the language name), and it didn't return any results. Seems like this change had never been discussed in the project.

PR Checklist

• This change adds/updates translations and I have used the template present here.
• I have enabled maintainer edits for this PR.
• 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 CDN resources/links.
• This change does not include any unrelated scripts such as bash and python scripts.
• This change updates the overridden internal templates from HUGO's repository.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[adityatelange]

Thanks @ppnplus