docs: update README with information about the participant VSCODE-587 (#841)

* docs: update README with information about the participant VSCODE-587

* refactor: wrap participant id

* refactor: remove empty line

* Update README.md

Co-authored-by: Rhys <[email protected]>

* Update README.md

Co-authored-by: Rhys <[email protected]>

* Update README.md

Co-authored-by: Rhys <[email protected]>

* Update README.md

Co-authored-by: Rhys <[email protected]>

* docs: update screenshot

---------

Co-authored-by: Rhys <[email protected]>

Author: alenakhineika

README.md

@@ -77,6 +77,25 @@ Connect to Atlas Stream Processing instances and develop stream processors using
 
 ![Atlas Stream Processing Playground](resources/screenshots/atlas-stream-processing.png)
 
+### MongoDB Copilot Participant
+
+Use natural language to interact with your clusters and generate MongoDB-related code with GitHub Copilot Chat in VS Code.
+
+_Note: To use the MongoDB Participant, you must have the [GitHub Copilot](https://marketplace.visualstudio.com/items?itemName=GitHub.copilot) extension. By using Copilot Chat you agree to [GitHub Copilot chat preview terms](https://docs.github.com/en/copilot/responsible-use-of-github-copilot-features/responsible-use-of-github-copilot-chat-in-your-ide). Find more details about the MongoDB GenAI Features in the [FAQ](https://www.mongodb.com/docs/generative-ai-faq/)._
+
+#### How to use the MongoDB Participant
+
+1. Enter `@MongoDB` in the chat input field to start a conversation with the MongoDB Participant.
+
+![MongoDB Participant](resources/screenshots/mongodb-participant.png)
+
+2. Start typing `/` in the chat window to get the list of available chat participant commands.
+
+![MongoDB Participant Commands](resources/screenshots/mongodb-participant-commands.png)
+
+- `/docs` is a participant command that finds answers to coding-related questions in the [MongoDB documentation](https://www.mongodb.com/docs/).
+- `/query` is a participant command that generates MongoDB queries from natural language to be used with a connected MongoDB cluster. It generates both queries and aggregations depending on the complexity of the request. It utilizes schema to reduce model hallucinations. It provides a code action to open generated code in a playground and an action to directly run the code from the Copilot chat interface.
+- `/schema` is a participant command that analyzes and returns information about a collection's schema.
 
 ## Extension Settings
 
@@ -99,6 +118,8 @@ Connect to Atlas Stream Processing instances and develop stream processors using
 | `mdb.useDefaultTemplateForPlayground` | Choose whether to use the default template for playground files or to start with an empty playground editor. | `true` |
 | `mdb.uniqueObjectIdPerCursor` | The default behavior is to generate a single ObjectId and insert it on all cursors. Set to true to generate a unique ObjectId per cursor instead. | `false` |
 | `mdb.sendTelemetry` | Opt-in and opt-out for diagnostic and telemetry collection.  | `true`  |
+| `mdb.confirmRunCopilotCode` | Show a confirmation message before running code generated by the MongoDB participant.  | `true`  |
+| `mdb.useSampleDocsInCopilot` | Enable sending sample field values with the VSCode copilot chat @MongoDB participant /query command.  | `false`  |
 
 ## Additional Settings