feat: Introduce StreamableHTTP transport at /mcp endpoint

[Winify]

• StreamableHTTPServerTransport for compatibility with llama.cpp and modern MCP clients
• Using --http flag for remote transport

Types of changes

• Polish (an improvement for an existing feature)
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (improvements to the project's docs)
• Specification changes (updates to WebDriver command specifications)
• Internal updates (everything related to internal scripts, governance documentation and CI files)

Checklist

• I have squashed commits that belong together
• I have tested with Claude Desktop (or another MCP-compatible client)
• I have read the CONTRIBUTING doc
• I have added the necessary documentation for new/changed tools (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

Reviewers: @webdriverio/project-committers