Add documentation for python code execution capability

documentation/docs/features/code_execution.md

@@ -0,0 +1,30 @@
+---
+---
+
+# Code Execution
+
+Khoj can generate and run very simple Python code snippets as well. This is useful if you want to generate a plot, run a simple calculation, or do some basic data manipulation. LLMs by default aren't skilled at complex quantitative tasks. Code generation & execution can come in handy for such tasks.
+
+Just use `/code` in your chat command.
+
+### Setup (Self-Hosting)
+Run [Cohere's Terrarium](https://github.com/cohere-ai/cohere-terrarium) on your machine to enable code generation and execution.
+
+Check the [instructions](https://github.com/cohere-ai/cohere-terrarium?tab=readme-ov-file#development) for running from source.
+
+For running with Docker, you can use our [docker-compose.yml](https://github.com/khoj-ai/khoj/blob/master/docker-compose.yml), or start it manually like this:
+
+```bash
+docker pull ghcr.io/khoj-ai/terrarium:latest
+docker run -d -p 8080:8080 ghcr.io/khoj-ai/terrarium:latest
+```
+
+#### Verify
+Verify that it's running, by evaluating a simple Python expression:
+
+```bash
+curl -X POST -H "Content-Type: application/json" \
+--url http://localhost:8080 \
+--data-raw '{"code": "1 + 1"}' \
+--no-buffer
+```