Remove ICO file from repository

Instead generate it as a pre-build step. It can't be generated as part
of the CMake build process because MSVC changes the PATH so that another
convert.exe conflicts with imagemagick's.

scripts/create_ico.js

@@ -4,7 +4,7 @@ const path = require('path');
 
 const svgPath = path.join('resources', 'icon.svg');
 const buildDirectory = path.join('build', 'icon');
-const outputPath = path.join('resources', 'icon.ico');
+const outputPath = path.join(buildDirectory, 'icon.ico');
 
 const sizes = [16, 20, 24, 30, 32, 36, 40, 48, 60, 64, 72, 80, 96, 128, 256];
 
@@ -29,5 +29,3 @@ sizes.forEach((size) => {
 
 convertArgs.push(outputPath);
 childProcess.execFileSync('convert', convertArgs);
-
-fs.removeSync(buildDirectory);

scripts/installer.iss

@@ -47,7 +47,7 @@ DefaultDirName={pf}\{#MyAppName}
 SourceDir=..\
 OutputBaseFilename=LOOT Installer
 OutputDir=build
-SetupIconFile=resources\icon.ico
+SetupIconFile=build\icon\icon.ico
 Compression=lzma
 SolidCompression=yes
 DisableDirPage=no