Add project files.

scripts/build.bat

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+@echo off
+REM Configure (if needed) and build the project, preferably with Ninja.
+REM
+REM Usage (from the project root):
+REM   scripts\build.bat [BUILD_TYPE]
+REM
+REM   BUILD_TYPE  Debug^|Release^|RelWithDebInfo^|MinSizeRel (default: Release)
+REM
+REM Set BUILD_DIR to build somewhere other than out\build (see Configuration.cmake).
+setlocal enabledelayedexpansion
+
+cd /d "%~dp0.."
+
+if "%BUILD_DIR%"=="" set "BUILD_DIR=out\build"
+set "BUILD_TYPE=%~1"
+if "%BUILD_TYPE%"=="" set "BUILD_TYPE=Release"
+if "%TOOLCACHE_DIR%"=="" set "TOOLCACHE_DIR=.cache\tools"
+
+where cmake >nul 2>nul
+if errorlevel 1 (
+    echo error: cmake not found on PATH.
+    exit /b 1
+)
+
+REM Prefer a pinned ninja (fetched by scripts\setup.bat -- see
+REM cmake\FetchNinja.cmake) over a system one, same "always the pinned
+REM copy" preference as Doxygen. Deliberately goto-based, and deliberately
+REM `pushd` + a bare wildcard rather than `for /d %%D in ("path\*")` --
+REM both tested directly; a path-prefixed wildcard didn't match here,
+REM this form does, and it also sidesteps nesting a FOR loop inside an
+REM if/else block, which separately corrupts cmd.exe's paren-matching for
+REM the enclosing block (see scripts\refactor.bat for that one).
+set "NINJA_BIN="
+if not exist "%TOOLCACHE_DIR%" goto check_system_ninja
+
+pushd "%TOOLCACHE_DIR%"
+for /d %%D in (ninja-*) do if exist "%%D\ninja.exe" if not defined NINJA_BIN set "NINJA_BIN=%%~fD\ninja.exe"
+popd
+
+if defined NINJA_BIN goto have_pinned_ninja
+
+:check_system_ninja
+where ninja >nul 2>nul
+if errorlevel 1 goto no_ninja
+echo ==^> Using system ninja
+set "GENERATOR_ARGS=-G Ninja"
+goto configure
+
+:have_pinned_ninja
+echo ==^> Using pinned ninja: %NINJA_BIN%
+set "GENERATOR_ARGS=-G Ninja -DCMAKE_MAKE_PROGRAM=%NINJA_BIN%"
+goto configure
+
+:no_ninja
+echo warning: ninja not found ^(no pinned copy, none on PATH^) -- falling back to
+echo          CMake's default generator for this platform. Run scripts\setup.bat
+echo          to fetch a pinned ninja, or install ninja yourself, for a faster
+echo          and more consistent build. Continuing without it.
+set "GENERATOR_ARGS="
+
+:configure
+echo ==^> Configuring (%BUILD_TYPE%) into %BUILD_DIR%\
+cmake %GENERATOR_ARGS% -S . -B "%BUILD_DIR%" -DCMAKE_BUILD_TYPE=%BUILD_TYPE%
+if errorlevel 1 exit /b 1
+
+echo ==^> Building
+cmake --build "%BUILD_DIR%"
+if errorlevel 1 exit /b 1
+
+echo ==^> Done. Run a module with:  scripts\run.bat ^<target-name^>
+exit /b 0