Make module types explicit and convert some to ESM (#15964)

build-scripts/gulp/app.js

@@ -1,59 +0,0 @@
-// Run HA develop mode
-
-const gulp = require("gulp");
-const env = require("../env");
-require("./clean.js");
-require("./translations.js");
-require("./locale-data.js");
-require("./gen-icons-json.js");
-require("./gather-static.js");
-require("./compress.js");
-require("./webpack.js");
-require("./service-worker.js");
-require("./entry-html.js");
-require("./rollup.js");
-require("./wds.js");
-
-gulp.task(
-  "develop-app",
-  gulp.series(
-    async function setEnv() {
-      process.env.NODE_ENV = "development";
-    },
-    "clean",
-    gulp.parallel(
-      "gen-service-worker-app-dev",
-      "gen-icons-json",
-      "gen-pages-dev",
-      "gen-index-app-dev",
-      "build-translations",
-      "build-locale-data"
-    ),
-    "copy-static-app",
-    env.useWDS()
-      ? "wds-watch-app"
-      : env.useRollup()
-      ? "rollup-watch-app"
-      : "webpack-watch-app"
-  )
-);
-
-gulp.task(
-  "build-app",
-  gulp.series(
-    async function setEnv() {
-      process.env.NODE_ENV = "production";
-    },
-    "clean",
-    gulp.parallel("gen-icons-json", "build-translations", "build-locale-data"),
-    "copy-static-app",
-    env.useRollup() ? "rollup-prod-app" : "webpack-prod-app",
-    // Don't compress running tests
-    ...(env.isTestBuild() ? [] : ["compress-app"]),
-    gulp.parallel(
-      "gen-pages-prod",
-      "gen-index-app-prod",
-      "gen-service-worker-app-prod"
-    )
-  )
-);