Add configurable exception reporter
Avoid leaking tool exceptions by sending them to a configurable exception reporter
Add optional context to pass to tools
Add basic instrumentation data/labels
- remove activesupport as a runtime dependency
- use alternative to activesupport/inflector methods
- use `json_rpc_handler` gem
- add json_rpc_handler to gem dependencies
- fix `lib/mcp-ruby` auto-import path
- implement server resources
- add basic listing of resources to Server
- allow setting handlers on Server
- wrap handler method results
- make tool definition more declarative
- make prompt definition more declarative
- bump dependency versions
