feat(ext/node): expose inspector.isEnabled() via process.binding('inspector') (#34203)
Node's internal inspector binding exposes isEnabled() so user code can
ask whether the debugger is currently attached. Deno's process.binding
('inspector') was an empty object, so any code reaching for that helper
hit \"inspector.isEnabled is not a function\" — most visibly the
test-inspector-enabled.js node_compat test, which uses it to verify
that --inspect=0 enables the inspector and that process._debugEnd()
later flips the state back off.
This adds a minimal inspector binding that delegates to the existing
op_inspector_enabled op (the same op backing process._debugEnd's gate),
enables the test in config.jsonc, and leaves room to grow the binding
with the rest of Node's surface later.