feat: 32-bit process support, scanner rescan filtering, suppress flash on navigate

- Add pointerSize() to Provider base; WoW64/ELF detection in ProcessMemory,
  WinDbg, and RemoteProcessMemory plugins
- Wire pointer size through NodeTree, source/XML imports, C++ generator,
  controller, compose, address parser, and RPC protocol header
- Add is32Bit to PluginProcessInfo and ProcessInfo; show (32-bit) in picker
- Scanner rescan now filters results against the current input value
- Go-to-address from scanner resets change tracking to prevent false flashing

src/imports/import_source.h

@@ -7,7 +7,9 @@ namespace rcx {
 // Supports two modes (auto-detected):
 //   1. With comment offsets (// 0xNN) - trusts the offset values
 //   2. Without comment offsets - computes offsets from type sizes
+// pointerSize: 4 for 32-bit targets, 8 for 64-bit (default).
 // Returns an empty NodeTree on failure; populates errorMsg if non-null.
-NodeTree importFromSource(const QString& sourceCode, QString* errorMsg = nullptr);
+NodeTree importFromSource(const QString& sourceCode, QString* errorMsg = nullptr,
+                          int pointerSize = 8);
 
 } // namespace rcx