Add Windows build script and update README with build instructions

a1_swap_mod_packer/__init__.py

@@ -1,3 +1,3 @@
 APP_NAME = "A1 Swap Mod Packer"
-__version__ = "0.4.0"
+__version__ = "0.5.0"
 APP_TITLE = f"{APP_NAME} v{__version__}"

a1_swap_mod_packer/cli.py

@@ -94,7 +94,7 @@ def create_parser() -> argparse.ArgumentParser:
     build.add_argument("--metadata-mode", choices=("source", "sum"), default="source", help="How to write slice_info prediction and weight.")
     build.add_argument("--line-ending", choices=("lf", "crlf"), default="crlf", help="Line ending for the generated G-code.")
     build.add_argument("--zip-level", type=int, choices=range(1, 10), default=DEFAULT_ZIP_COMPRESS_LEVEL, metavar="1-9", help="zlib-ng Deflate compression level for the output 3MF. Default: 7.")
-    build.add_argument("--no-preview-label", action="store_true", help="Do not add a plate-count label to the first preview image.")
+    build.add_argument("--no-preview-label", action="store_true", help="Do not rewrite the preview image label/composite.")
     build.add_argument("--no-gcode-patches", action="store_true", help=f"Do not apply editable patches from {default_patch_config_path()}.")
     build.set_defaults(func=build_command)
 

a1_swap_mod_packer/paths.py

@@ -9,6 +9,16 @@ PATCH_CONFIG_FILE_NAME = "gcode_patches.ini"
 
 
 def program_root() -> Path:
+    compiled = globals().get("__compiled__")
+    if compiled is not None and getattr(compiled, "onefile", False):
+        containing_dir = getattr(compiled, "containing_dir", None)
+        if containing_dir:
+            return Path(containing_dir).resolve()
+
+        original_argv0 = getattr(compiled, "original_argv0", None)
+        if original_argv0:
+            return Path(original_argv0).resolve().parent
+
     if getattr(sys, "frozen", False):
         return Path(sys.executable).resolve().parent
     return Path(__file__).resolve().parents[1]