feat(lsp): method call hierarchy for extend Type / .Method (0.9)

Index methods inside extend/impl blocks and include .Method( call sites
in the call graph so IDEs can navigate receiver methods.

- analyzeFile: track extend/impl brace scope; kind=method + container
- Call hierarchy treats methods as callables; display Type.Method
- smoke_lsp_method_hierarchy (Scale→Len, Main→Scale)

Makefile

@@ -202,6 +202,9 @@ test-lsp: lsp
 	@echo "=== LSP call hierarchy smoke ==="
 	@chmod +x tools/smoke_lsp_call_hierarchy.sh
 	@tools/smoke_lsp_call_hierarchy.sh
+	@echo "=== LSP method call hierarchy smoke ==="
+	@chmod +x tools/smoke_lsp_method_hierarchy.sh
+	@tools/smoke_lsp_method_hierarchy.sh
 
 .PHONY: test-registry
 test-registry: build