Add Windsurf IDE support to brev open command

[devin-ai-integration]

Add Windsurf IDE support to brev open command and fix lint issues

Summary

This PR adds Windsurf IDE support to the brev open command, following the existing pattern used for VS Code and Cursor. Users can now run brev open instance windsurf to open their Brev instances in Windsurf IDE with automatic SSH remote connection setup.

Additionally, this PR fixes lint issues in the codebase by refactoring two functions that exceeded complexity limits:

• openEditorWithSSH function was reduced from 43 to ~35 statements by extracting helper functions
• runOpenCommand cyclomatic complexity was reduced from 18 to ~12 by consolidating repeated error handling

Key additions:

• EditorWindsurf constant and Windsurf support in editor type validation
• Windsurf-specific utility functions for extension installation and command execution
• Platform-specific executable path detection for Windows, macOS, and Linux
• Automatic installation of required extensions (ms-vscode-remote.remote-ssh, ms-toolsai.jupyter-keymap, ms-python.python)

Refactoring improvements:

• Extracted getEditorName() helper to eliminate duplicated switch statements
• Extracted handlePathError() helper to reduce repeated UpdateUser pattern
• Extracted openEditorByType() helper to simplify editor opening logic
• Extracted validateRemoteWorkspace() helper to reduce function complexity

Review & Testing Checklist for Human

• Test Windsurf opening on different platforms - Install Windsurf locally and verify brev open instance windsurf works correctly on Windows/macOS/Linux
• Verify extension auto-installation - Check that required VS Code extensions are automatically installed in Windsurf and handle installation failures gracefully
• Test existing VS Code/Cursor functionality - Ensure brev open instance code and brev open instance cursor still work as expected after refactoring
• Verify PATH error handling - Test scenarios where windsurf executable is not in PATH and confirm error messages are helpful
• Test cross-platform executable detection - Verify Windsurf is found in common installation locations across different operating systems

Recommended test plan:

1. Install Windsurf IDE on your local machine
2. Set up a Brev instance and test brev open instance windsurf
3. Verify SSH remote connection establishes properly
4. Check that required extensions are installed automatically
5. Test fallback behavior when Windsurf is not installed or not in PATH
6. Regression test VS Code and Cursor opening to ensure no breakage

---

Diagram

%%{ init : { "theme" : "default" }}%%
graph TD
    CLI["brev open command<br/>pkg/cmd/open/open.go"]:::major-edit
    UTIL["Utility functions<br/>pkg/util/util.go"]:::major-edit
    
    CLI --> |"calls"| getEditorName["getEditorName()<br/>helper function"]:::major-edit
    CLI --> |"calls"| handlePathError["handlePathError()<br/>helper function"]:::major-edit
    CLI --> |"calls"| openEditorByType["openEditorByType()<br/>helper function"]:::major-edit
    CLI --> |"calls"| validateRemoteWorkspace["validateRemoteWorkspace()<br/>helper function"]:::major-edit
    
    openEditorByType --> |"windsurf case"| openWindsurf["openWindsurf()<br/>new function"]:::major-edit
    openEditorByType --> |"existing"| openVsCode["openVsCode()"]:::context
    openEditorByType --> |"existing"| openCursor["openCursor()"]:::context
    
    UTIL --> |"new"| TryRunWindsurfCommand["TryRunWindsurfCommand()"]:::major-edit
    UTIL --> |"new"| InstallWindsurfExtension["InstallWindsurfExtension()"]:::major-edit
    
    subgraph Legend
        L1[Major Edit]:::major-edit
        L2[Minor Edit]:::minor-edit  
        L3[Context/No Edit]:::context
    end

    classDef major-edit fill:#90EE90
    classDef minor-edit fill:#87CEEB
    classDef context fill:#FFFFFF

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Notes

• URI Scheme Assumption: The implementation assumes Windsurf uses the same vscode-remote://ssh-remote+ URI scheme as VS Code and Cursor. This should be verified with actual Windsurf documentation.
• Platform Coverage: Added executable paths for common Windsurf installation locations, but coverage may not be exhaustive across all Linux distributions and installation methods.
• Extension Compatibility: Assumes Windsurf is compatible with VS Code extensions, which should be validated.

Session Info:

• Link to Devin run: https://app.devin.ai/sessions/b15a37020a16414eb1512e08f0925a6a
• Requested by: @theFong

[devin-ai-integration]

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[theFong]

can you fix the lint issues?