[FEATURE]: Add Switch transpiler installation infrastructure

[hiroyukinakazato-db]

Is there an existing issue for this?

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Category of feature request

Transpiler

Problem statement

We need to add installation infrastructure for Switch, a new LLM-powered transpiler. The current installation system doesn't support Switch's requirements for workspace deployment and job creation.

Proposed Solution

Add Switch installation support:

• Add Switch package to dependencies
• Create SwitchInstaller class for workspace deployment
• Update base TranspilerInstaller to support WorkspaceClient
• Add Switch to transpiler installer list
• Include Switch cleanup in uninstall process
• Add unit tests for installation functionality

Additional Context

This is the foundation needed before Switch CLI features can be implemented. Must be merged first to enable Switch imports.