Rename hush→dragonx across wallet codebase

- Rename RESOURCE_HUSHD/HUSH_CLI/HUSH_TX to RESOURCE_DRAGONXD/DRAGONX_CLI/DRAGONX_TX
- Remove unused .bat resource constants (DRAGONXD_BAT, DRAGONX_CLI_BAT)
- Update INCBIN symbols: g_hushd_exe → g_dragonxd_exe, etc.
- Update daemon search paths, removing hush-arrakis-chain fallbacks
- Update process detection (Windows findProcessByName, Linux /proc/comm, macOS pgrep)
- Update build.sh: embed dragonxd.exe/dragonx-cli.exe/dragonx-tx.exe
- Overhaul setup.sh: fix binary names, release paths, add -j passthrough
- Update getDaemonPath/needsDaemonExtraction/hasDaemonAvailable for new names

src/ui/pages/settings_page.cpp

@@ -1688,7 +1688,7 @@ void RenderSettingsPage(App* app) {
                 "Changes take effect after restarting the daemon.");
             ImGui::Dummy(ImVec2(0, Layout::spacingSm()));
 
-            // The 22 hushd debug categories
+            // The 22 dragonxd debug categories
             static const char* debugCats[] = {
                 "addrman", "alert", "bench", "coindb", "db", "estimatefee",
                 "http", "libevent", "lock", "mempool", "net",