Add a python script to install Direct3D 12 SDK components.

This makes it much faster to get started with Direct3D 12 builds,
as you only need to run `python .\misc\scripts\install_d3d12_sdk_windows.py`
then run `scons d3d12=yes`.

This installs DirectX Shader Compiler, Mesa NIR, WinPixEventRuntime
and DirectX 12 Agility SDK.

- Define a default path that uses the locations from the script.
- Now the default path is in "%LOCALAPPDATA%\Godot\build_deps\"
- Updated CI to use this new python script.

Co-Authored-By: Hugo Locurcio <hugo.locurcio@hugo.pro>

misc/scripts/install_d3d12_sdk_windows.py

@@ -0,0 +1,98 @@
+#!/usr/bin/env python
+
+import os
+import urllib.request
+import shutil
+
+# Base Godot dependencies path
+deps_folder = os.path.join(f"{os.getenv('LOCALAPPDATA')}", "Godot", "build_deps")
+# DirectX Shader Compiler
+dxc_version = "v1.7.2308"
+dxc_filename = "dxc_2023_08_14.zip"
+dxc_archive = os.path.join(deps_folder, dxc_filename)
+dxc_folder = os.path.join(deps_folder, "dxc")
+# Mesa NIR
+mesa_version = "23.1.0-devel"
+mesa_filename = "godot-nir-23.1.0-1-devel.zip"
+mesa_archive = os.path.join(deps_folder, mesa_filename)
+mesa_folder = os.path.join(deps_folder, "mesa")
+# WinPixEventRuntime
+pix_version = "1.0.231030001"
+pix_archive = os.path.join(deps_folder, f"WinPixEventRuntime_{pix_version}.nupkg")
+pix_folder = os.path.join(deps_folder, "pix")
+# DirectX 12 Agility SDK
+agility_sdk_version = "1.610.4"
+agility_sdk_archive = os.path.join(deps_folder, f"Agility_SDK_{agility_sdk_version}.nupkg")
+agility_sdk_folder = os.path.join(deps_folder, "agility_sdk")
+
+# Create dependencies folder
+if not os.path.exists(deps_folder):
+    os.makedirs(deps_folder)
+
+# DirectX Shader Compiler
+print("[1/4] DirectX Shader Compiler")
+if os.path.isfile(dxc_archive):
+    os.remove(dxc_archive)
+print(f"Downloading DirectX Shader Compiler {dxc_filename} ...")
+urllib.request.urlretrieve(
+    f"https://github.com/microsoft/DirectXShaderCompiler/releases/download/{dxc_version}/{dxc_filename}",
+    dxc_archive,
+)
+if os.path.exists(dxc_folder):
+    print(f"Removing existing local DirectX Shader Compiler installation in {dxc_folder} ...")
+    shutil.rmtree(dxc_folder)
+print(f"Extracting DirectX Shader Compiler {dxc_filename} to {dxc_folder} ...")
+shutil.unpack_archive(dxc_archive, dxc_folder)
+os.remove(dxc_archive)
+print(f"DirectX Shader Compiler {dxc_filename} installed successfully.\n")
+
+# Mesa NIR
+print("[2/4] Mesa NIR")
+if os.path.isfile(mesa_archive):
+    os.remove(mesa_archive)
+print(f"Downloading Mesa NIR {mesa_filename} ...")
+urllib.request.urlretrieve(
+    f"https://github.com/godotengine/godot-nir-static/releases/download/{mesa_version}/{mesa_filename}",
+    mesa_archive,
+)
+if os.path.exists(mesa_folder):
+    print(f"Removing existing local Mesa NIR installation in {mesa_folder} ...")
+    shutil.rmtree(mesa_folder)
+print(f"Extracting Mesa NIR {mesa_filename} to {mesa_folder} ...")
+shutil.unpack_archive(mesa_archive, mesa_folder)
+os.remove(mesa_archive)
+print(f"Mesa NIR {mesa_filename} installed successfully.\n")
+
+# WinPixEventRuntime
+print("[3/4] WinPixEventRuntime")
+if os.path.isfile(pix_archive):
+    os.remove(pix_archive)
+print(f"Downloading WinPixEventRuntime {pix_version} ...")
+urllib.request.urlretrieve(f"https://www.nuget.org/api/v2/package/WinPixEventRuntime/{pix_version}", pix_archive)
+if os.path.exists(pix_folder):
+    print(f"Removing existing local WinPixEventRuntime installation in {pix_folder} ...")
+    shutil.rmtree(pix_folder)
+print(f"Extracting WinPixEventRuntime {pix_version} to {pix_folder} ...")
+shutil.unpack_archive(pix_archive, pix_folder, "zip")
+os.remove(pix_archive)
+print(f"WinPixEventRuntime {pix_version} installed successfully.\n")
+
+# DirectX 12 Agility SDK
+print("[4/4] DirectX 12 Agility SDK")
+if os.path.isfile(agility_sdk_archive):
+    os.remove(agility_sdk_archive)
+print(f"Downloading DirectX 12 Agility SDK {agility_sdk_version} ...")
+urllib.request.urlretrieve(
+    f"https://www.nuget.org/api/v2/package/Microsoft.Direct3D.D3D12/{agility_sdk_version}", agility_sdk_archive
+)
+if os.path.exists(agility_sdk_folder):
+    print(f"Removing existing local DirectX 12 Agility SDK installation in {agility_sdk_folder} ...")
+    shutil.rmtree(agility_sdk_folder)
+print(f"Extracting DirectX 12 Agility SDK {agility_sdk_version} to {agility_sdk_folder} ...")
+shutil.unpack_archive(agility_sdk_archive, agility_sdk_folder, "zip")
+os.remove(agility_sdk_archive)
+print(f"DirectX 12 Agility SDK {agility_sdk_version} installed successfully.\n")
+
+# Complete message
+print(f"All Direct3D 12 SDK components were installed to {deps_folder} successfully!")
+print('You can now build Godot with Direct3D 12 support enabled by running "scons d3d12=yes".')