build: embed ui.toml and banlist with INCBIN instead of a configure loop

ui.toml and the default banlist were embedded by a CMake function that
read each file and emitted a C array header one byte at a time in a
configure-time loop. That is slow to configure, and because the result
is a header, editing either resource recompiled every translation unit
that included it.

- Both files are now embedded with INCBIN from a small generated
  translation unit, the same pattern already used for the fonts. There
  is no generated header, so editing a resource re-assembles one tiny
  object file instead of triggering a wide recompile, and configure does
  no per-byte work.
- Consumers include a hand-written header declaring the symbols and
  always use the embedded data (the __has_include fallback is gone). The
  data is not NUL-terminated, so every consumer passes an explicit size.
- The old EmbedResources.cmake script is removed, and the generated unit
  is added to the app and test builds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app_network.cpp

@@ -54,7 +54,7 @@
 #include "util/pool_registry.h"
 #include "ui/notifications.h"
 #include "ui/schema/skin_manager.h"
-#include "default_banlist_embedded.h"
+#include "embedded/embedded_text.h"
 #include "util/amount_format.h"
 #include "util/http_download.h"
 #include "data/exchange_info.h"
@@ -3742,8 +3742,8 @@ void App::applyDefaultBanlist()
     if (!state_.connected || !rpc_ || !worker_) return;
 
     // Parse the embedded default_banlist.txt (compiled from res/default_banlist.txt)
-    std::string data(reinterpret_cast<const char*>(embedded::default_banlist_data),
-                     embedded::default_banlist_size);
+    std::string data(reinterpret_cast<const char*>(g_default_banlist_data),
+                     g_default_banlist_size);
 
     std::vector<std::string> ips;
     size_t pos = 0;