Improve GitHub SEO: badges, topics, description, community files

- Add CI, Maven Central, Gradle Plugin Portal badges to README (EN + KO)
- Enhance mkdocs.yml with site_author, copyright, social footer
- Update repository description with richer keywords
- Add 12 GitHub topics (java, python, cpython, jvm, etc.)
- Create CONTRIBUTING.md, SECURITY.md, CODE_OF_CONDUCT.md
- Enable GitHub Discussions and set homepage URL

Author: white

.output.txt

@@ -0,0 +1,28 @@
+# Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Focusing on what is best for the community
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the repository maintainer. All complaints will be reviewed and
+investigated promptly and fairly.

CODE_OF_CONDUCT.md

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+# Contributing to PythonEmbed
+
+Thank you for your interest in contributing! Here's how to get started.
+
+## Development Setup
+
+```bash
+git clone https://github.com/howtis/python-embed.git
+cd python-embed
+./gradlew build
+```
+
+Requirements: JDK 17+, Python 3.8+ (auto-downloaded if absent).
+
+## Running Tests
+
+```bash
+./gradlew test
+```
+
+## Pull Request Process
+
+1. Fork the repository and create a feature branch.
+2. Make your changes and add tests where appropriate.
+3. Run `./gradlew build` to verify everything passes.
+4. Submit a pull request with a clear description of your changes.
+
+## Code Style
+
+- Follow existing code style in each module.
+- Keep changes focused — one feature or fix per PR.
+- Match the existing comment frequency in the codebase.
+
+## Reporting Issues
+
+Use the [GitHub Issues](https://github.com/howtis/python-embed/issues) page. Include:
+
+- PythonEmbed version
+- Java and Python versions
+- Steps to reproduce
+- Expected vs. actual behavior

CONTRIBUTING.md

@@ -2,6 +2,9 @@
 
 # PythonEmbed
 
+[![CI](https://github.com/howtis/python-embed/actions/workflows/ci.yml/badge.svg)](https://github.com/howtis/python-embed/actions/workflows/ci.yml)
+[![Maven Central](https://img.shields.io/maven-central/v/io.github.howtis/python-embed-runtime)](https://central.sonatype.com/artifact/io.github.howtis/python-embed-runtime)
+[![Gradle Plugin Portal](https://img.shields.io/gradle-plugin-portal/v/io.github.howtis.python-embed)](https://plugins.gradle.org/plugin/io.github.howtis.python-embed)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 
 Java에서 Python 코드를 실행하세요 — 완전한 CPython 호환성, 설정 불필요.

README.ko.md

@@ -2,6 +2,9 @@
 
 # PythonEmbed
 
+[![CI](https://github.com/howtis/python-embed/actions/workflows/ci.yml/badge.svg)](https://github.com/howtis/python-embed/actions/workflows/ci.yml)
+[![Maven Central](https://img.shields.io/maven-central/v/io.github.howtis/python-embed-runtime)](https://central.sonatype.com/artifact/io.github.howtis/python-embed-runtime)
+[![Gradle Plugin Portal](https://img.shields.io/gradle-plugin-portal/v/io.github.howtis.python-embed)](https://plugins.gradle.org/plugin/io.github.howtis.python-embed)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 
 Run Python code from Java — with full CPython compatibility and zero setup.