thymeleaf tutorial added

[Yashgabani845]

Related Issue

Fix: #503

Description

As per i said in issue i have created new secion of thymeleaf in JAVA
and added 4 files

1. introduction to thymeleaf
2. synhtaxes in thymeleaf
3. iteration and conditional evalution in thymeleaf
4. category.json

also given best content and used only official documentation and added best parts of that

Type of PR

• Feature enhancement
• Documentation update

Screenshots / Videos (if applicable)

[Attach any relevant screenshots or videos demonstrating the changes]

Checklist

• I have performed a self-review of my code.
• I have read and followed the Contribution Guidelines.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have commented my code, particularly in hard-to-understand areas.

Additional Context

please look over my work in file changes
and please if you think that this is deserving more than level2 then please upgrade it
i am not doing repetitive task or just running one code or giving one code solution
gone thorugh official docs and getting this, at the end it's upto you
thank you

Resources for Guidance

Here are some resources that may be helpful as you contribute to CodeHarborHub:

• Code Harbor Hub Community Features
• Docusaurus Documentation
• React.js Documentation
• Markdown Guide
• MDX Documentation
• Mermaid Documentation

Resources for DSA Features on Our Site:

• Tabs: Switch Languages
• Line Numbering
• Math Equations

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
codeharborhub-github-io	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 4, 2024 0:22am

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[deepsource-io]

Here's the code health analysis summary for commits a3efb0d..9697c2e. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗

---

💡 If you’re a repository administrator, you can configure the quality gates from the settings.

[Yashgabani845]

@ajay-dhangar
uploaded section of Thymeleaf tutorial

[ajay-dhangar]

okay,