feat: add Simon Willison's LLM CLI from the llm-container

Signed-off-by: Aaron Wislang <aaron.wislang@microsoft.com>

Author: asw101

.devcontainer/ai-container/Dockerfile

@@ -92,6 +92,25 @@ USER vscode
 RUN npm install -g @anthropic-ai/claude-code @google/gemini-cli @charmland/crush @github/copilot
 USER root
 
+# Install Simon Willison's LLM CLI in an isolated venv for consistency
+USER root
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends python3 python3-venv python3-pip \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN python3 -m venv /opt/llm-env
+ENV PATH="/opt/llm-env/bin:${PATH}"
+
+USER vscode
+RUN /opt/llm-env/bin/pip install --upgrade pip \
+    && /opt/llm-env/bin/pip install llm \
+    && /opt/llm-env/bin/llm install llm-gpt4all \
+    && /opt/llm-env/bin/llm install llm-claude-3 \
+    && /opt/llm-env/bin/llm install llm-gemini \
+    && /opt/llm-env/bin/llm install llm-ollama \
+    && /opt/llm-env/bin/llm install llm-foundry
+USER root
+
 # Install Wassette from source using Cargo
 ARG DEBIAN_FRONTEND=noninteractive
 ARG WASSETTE_REF=main