Setup dev container and MCP infrastructure

Add dev container configuration with docker-compose, Dockerfile, and entrypoint script

- Create .devcontainer/devcontainer.json for VS Code dev container
- Create .devcontainer/docker-compose.yml for container setup
- Add Dockerfile with Python, Go, Rust, R, and jj tools
- Add docker-entrypoint.sh to initialize .ai_index and start mcp-server
- Add Makefile for container management and MCP operations
- Add .gitignore entries for AI index
- Add OpenCode global instructions
- Add basic MCP server and tool for listing Go imports
- Add Zed integration configuration
- Update README with project vision and structure

Dockerfile

@@ -0,0 +1,40 @@
+FROM debian:bookworm-slim
+
+RUN apt-get update && apt-get install -y \
+    python3 python3-pip \
+    golang-go rustc cargo \
+    r-base \
+    sqlite3 build-essential git curl wget \
+    bash zsh \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Installer jj
+RUN curl -LO https://github.com/martinvonz/jj/releases/latest/download/jj-x86_64-unknown-linux-gnu \
+    && chmod +x jj-x86_64-unknown-linux-gnu \
+    && mv jj-x86_64-unknown-linux-gnu /opt/bin/jj
+
+# Installer jj_lsp (si binaire séparé)
+RUN curl -LO https://github.com/martinvonz/jj/releases/latest/download/jj_lsp-x86_64-unknown-linux-gnu \
+    && chmod +x jj_lsp-x86_64-unknown-linux-gnu \
+    && mv jj_lsp-x86_64-unknown-linux-gnu /opt/bin/jj_lsp
+
+COPY opt/bin/ /opt/bin/
+COPY opt/dev-tools/ /opt/dev-tools/
+COPY opt/lm-client/ /opt/lm-client/
+
+ENV PATH="/opt/bin:/opt/dev-tools:/opt/lm-client:${PATH}"
+
+ARG USERNAME=devuser
+ARG USER_UID=1000
+ARG USER_GID=1000
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME
+
+COPY docker-entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+USER $USERNAME
+WORKDIR /workspace
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+CMD ["/bin/bash"]