[Feature]: add instructions for using context-mode with Jetbrains Copilot plugin

[epic-64]

Platform

Jetbrains/Copilot

Feature description

There are instructions for how to use context mode with VS Code Copilot plugin. But in Jetbrains, unfortunately setting up MCP tools works a bit differently.

It would be great to have the instructions how to enable it in Jetbrains IDEs (IntelliJ, PyCharm, PHPStorm etc)

Use case

I would like to use context-mode in PyCharm and IntelliJ, when using the Jetbrains Copilot plugin

Proposed solution

• achieve a working proof of concept in an Jetbrains IDE with the Copilot plugin
• document the steps needed