Add Lemon8 to supported sites

[frangelbarrera]

Description

Added Lemon8 to the supported sites list. Lemon8 is a growing lifestyle social media platform by ByteDance.

Checklist

• The site is not already in data.json.
• The site is not a duplicate of another site.
• The url and urlMain are correct.
• The errorType is correctly identified (status_code).
• A username_claimed is provided for testing.
• The regexCheck is accurate for the platform's username rules.

Testing

• Verified with existing user: luniaa_0
• Verified with non-existent user: non_existent_user_123456789

[github-actions]

Automatic validation of changes

Target	F+ Check	F- Check
Lemon8	✔️   Pass	❌   Fail

---

Failures were detected on at least one updated target. Commits containing accuracy failures will often not be merged (unless a rationale is provided, such as false negatives due to regional differences).

[github-actions]

Automatic validation of changes

Target	F+ Check	F- Check
Lemon8	✔️   Pass	❌   Fail

---

Failures were detected on at least one updated target. Commits containing accuracy failures will often not be merged (unless a rationale is provided, such as false negatives due to regional differences).

[frangelbarrera]

Hi! The F- Check is failing likely due to Lemon8's aggressive anti-bot measures or regional geoblocking on GitHub Actions runners. I have verified the site manually and included a proper User-Agent to mitigate this. The configuration is correct for manual use of Sherlock.