Fry3DX 0.5: builds for Windows, Linux and Android, a phone layout, Apache 2.0

- Apache License 2.0
- Windows: cross-built with clang-cl (cmake --preset windows), a window
  program with its icon; Linux: a portable preset (SDL and the C++
  library inside); Android: android/build_apk.py makes the APK
- tools/package.py packs the downloads; a GitHub workflow builds all
  three and makes a release for a v* tag
- A phone layout (fry_touch, on by default on Android): the UI drawn
  bigger, panels when asked for, a bar of big buttons, one finger to
  turn the view, two to move and pinch, a long press for a right-click;
  files through the phone's file picker
- Settings and autosaves now in a Nexoniarz folder (copied over once)
- README rewritten, the website shows the downloads and the phone

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NMSrd5oe1GpUD7E6d825KP

src/fry3dx.rc

@@ -0,0 +1,25 @@
+// Windows: the program's icon and details (Explorer's Properties).
+1 ICON "../branding/fry3dx.ico"
+1 VERSIONINFO
+FILEVERSION 0,5,0,0
+PRODUCTVERSION 0,5,0,0
+BEGIN
+  BLOCK "StringFileInfo"
+  BEGIN
+    BLOCK "040904b0"
+    BEGIN
+      VALUE "CompanyName", "Nexoniarz"
+      VALUE "FileDescription", "Fry3DX - Frying 3D Extreme"
+      VALUE "FileVersion", "0.5.0"
+      VALUE "InternalName", "fry3dx"
+      VALUE "LegalCopyright", "Copyright 2026 Nexoniarz, Apache License 2.0"
+      VALUE "OriginalFilename", "fry3dx.exe"
+      VALUE "ProductName", "Fry3DX"
+      VALUE "ProductVersion", "0.5.0"
+    END
+  END
+  BLOCK "VarFileInfo"
+  BEGIN
+    VALUE "Translation", 0x409, 1200
+  END
+END