[WASM] Integration tests: Vended tools

[awsarron]

Parent issue

strands-agents/sdk-typescript#1104

Scope

Write integration tests validating the built-in vended tools that run inside the WASM guest:

• BashTool() - persistent shell sessions, command execution, timeout
• FileEditorTool() - view, create, str_replace, insert operations
• HttpRequestTool() - HTTP requests via fetch (all methods, headers, timeout)
• NotebookTool() - named persistent text notebooks with CRUD

Context

Unlike decorated tools (which cross back to Python), vended tools execute entirely inside the WASM guest. They are configured via WIT vended-tool variant arms and instantiated by the TS SDK.

Key areas:

• Configuration passes correctly from Python dataclass → WIT → TS FunctionTool
• Tools produce correct results visible in agent responses
• BashTool/FileEditorTool work with the WASM guest filesystem or host capabilities
• HttpRequestTool makes real HTTP calls from within WASM

Done when

• BashTool executes commands and returns output
• FileEditorTool performs file operations
• HttpRequestTool makes HTTP requests successfully
• NotebookTool stores and retrieves content
• Tools work correctly when used by the model in conversation