feat: enum/bitfield editing, MCP guard rails, PDB anonymous type inlining

- Enum inline editing: name/value commit handling, auto-sort by value
- Bitfield support in PDB import with proper container nodes
- Per-member hover/selection highlighting (kMemberBit encoding)
- Context menu fixes for enum/bitfield member lines
- MCP pagination (limit/offset), includeMembers param, tree.search tool
- MCP status bar activity indicator for tool calls
- PDB anonymous type inlining: inline <unnamed-tag> types as children
- Skip anonymous pointer targets to prevent root orphans
- Enum import diagnostics for debugging missing enums

src/examples/EPROCESS.rcx

@@ -41,7 +41,10 @@
         {"id":"182","kind":"Hex32","name":"State:3 StackCount:29","offset":0,"parentId":"180"},
 
         {"id":"190","kind":"Struct","name":"kexecute_options","structTypeName":"_KEXECUTE_OPTIONS","classKeyword":"union","offset":0,"parentId":"0","refId":"0","collapsed":true},
-        {"id":"191","kind":"Hex8","name":"ExecuteOptions","offset":0,"parentId":"190"},
+        {"id":"191","kind":"Struct","name":"","offset":0,"parentId":"190","refId":"0","collapsed":false},
+        {"id":"192","kind":"UInt8","name":"ExecuteDisable","offset":0,"parentId":"191"},
+        {"id":"193","kind":"Hex8","name":"ExecuteDisable:1 ExecuteEnable:1 DisableThunkEmulation:1 Permanent:1 ExecuteDispatchEnable:1 ImageDispatchEnable:1 DisableExceptionChainValidation:1 Spare:1","offset":0,"parentId":"191"},
+        {"id":"194","kind":"UInt8","name":"ExecuteOptions","offset":0,"parentId":"190"},
 
         {"id":"200","kind":"Struct","name":"se_audit_info","structTypeName":"_SE_AUDIT_PROCESS_CREATION_INFO","offset":0,"parentId":"0","refId":"0","collapsed":true},
         {"id":"201","kind":"Pointer64","name":"ImageFileName","offset":0,"parentId":"200"},