Adds LSP call hierarchy support for TCL procedures and MOM events.
A symbol index and identity logic underpin incoming and outgoing calls.
LSP call hierarchy features are wired and changelog/README updated.
- Implement data encoding for call hierarchy items and identity restoration
- Wire LSP server to expose prepare_call_hierarchy, incoming_calls, and outgoing_calls
- Add tests for cross-file calls and edge cases
Christoph Brandau
41d117fe2c