Add dev container configuration

[Copilot]

Adds dev container configuration matching the CI environment from GitHub Actions workflows.

devcontainer.json

• Base: mcr.microsoft.com/devcontainers/base:ubuntu
• Features: CMake (latest), Python (latest), Node.js (latest)
• VS Code extensions: cpptools-extension-pack, cmake-tools, clang-format, python, pylance, pyright, ruff, biome

post-create.sh

• APT: libgtest-dev, clang-format

• Python: uv package manager, syncs dev dependencies, adds PATH to bashrc

• Node.js: npm ci

• Emscripten: installs to ~/emsdk with shell integration, pulls updates if already exists

• Pre-commit hooks installation

• Fixes 写一个dev container的配置 #51

Original prompt

---

This section details on the original issue you should resolve

<issue_title>写一个dev container的配置</issue_title>
<issue_description></issue_description>

<agent_instructions>参考github action的内容, 你会知道怎么配置相关的环境.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes 写一个dev container的配置 #51

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[hzhangxyz]

1. feature中的python和node都用最新版本的
2. clang-format.vscode-clang-format , ms-vscode.cpptools-extension-pack , ms-pyright.pyright , 加上
3. esbenp.prettier-vscode 去掉
4. export PATH="$HOME/.local/bin:$PATH" 这个要丢到 bashrc里
5. EMSDK_DIR 如果存在需要pull

[Copilot]

1. feature中的python和node都用最新版本的
2. clang-format.vscode-clang-format , ms-vscode.cpptools-extension-pack , ms-pyright.pyright , 加上
3. esbenp.prettier-vscode 去掉...

Addressed all feedback in af51fdc:

1. Changed Python and Node versions to "latest"
2. Added clang-format.vscode-clang-format, ms-vscode.cpptools-extension-pack, ms-pyright.pyright
3. Removed esbenp.prettier-vscode
4. Added PATH export to bashrc
5. EMSDK_DIR now does git pull if it already exists