feat: Add TypeScript Action (#83)

cf. https://github.com/peaceiris/actions-github-pages
Close #54

src/utils.ts

@@ -0,0 +1,15 @@
+import * as core from '@actions/core';
+
+export function getHomeDir(): string {
+  let homedir = '';
+
+  if (process.platform === 'win32') {
+    homedir = process.env['USERPROFILE'] || 'C:\\';
+  } else {
+    homedir = `${process.env.HOME}`;
+  }
+
+  core.debug(`homeDir: ${homedir}`);
+
+  return homedir;
+}