Integrate logger client into cdp-client with service-based discovery

[stefanrammo]

Bundle cdplogger-client as studio.logger and add client.logger() method that discovers loggers via ServicesNotification and connects through proxy transport via makeServiceTransport (CDP 5.1+).

• client.logger(name, options): auto-discovers logserver proxy service, creates service transport, passes to LoggerClient constructor
• client.loggers(): returns all discovered logger services as [{name, metadata}] after first ServicesNotification
• LoggerClient constructor extended to accept service transport object in addition to endpoint string (autoReconnect forced false)
• Caching by name with eviction on transport close
• close() disconnects cached loggers and rejects pending promises
• Logger transports registered in serviceConnections for proper cleanup on primary connection drop
• Rejects immediately on CDP < 5.1 (no proxy protocol support)
• Proto files use raw .proto.js format matching studioapi.proto.js, with Node/browser parity via require() and window globals
• Unit tests adapted from cdplogger-client test suite
• README.rst updated with Logger Integration API documentation

[stefanrammo]

The bundled logger client is adapted from https://github.com/CDPTechnologies/JavascriptCDPLoggerClient with these changes to support integration:

1. Proto loading: replaced pre-compiled containerPb.js with runtime protobuf.parse() of raw .proto.js files — same format as studioapi.proto.js, Node/browser parity via require() and window globals
2. Transport mode: constructor accepts a service transport object (duck-typed via typeof send === 'function'), forces autoReconnect = false, wires onopen/onmessage/onerror/onclose handlers — enables tunneling through StudioAPI proxy
3. disconnected flag: tracks connection state for cache eviction in client.logger()
4. _rejectIfDisconnected() guard: every public method rejects immediately after disconnect() or transport close
5. countEvents dispatch: added missing case in _sendQueuedRequests switch