[FEATURE] Jetbrains plugin should support setting parent folder as working folder

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Very many projects place solution files used by IDEs in the src/ subfolder or similar.
When opening the plugin in Rider it always opens Claude Code in the same folder as the solution. I assume it is the same for all the other Jetbrains IDEs. This gives the session the wrong context causing all sorts of problems.

Proposed Solution

Add a configuration option on a per solution/project basis to make a parent folder X steps up, the folder in which to open Claude Code

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_