feat(pv-scripts): add support for webpack build caching

this allows for much faster `pv-scripts  dev` start when the code hasn't been canged since the last
time

packages/pv-scripts/helpers/webpackConfigHelpers.js

@@ -25,6 +25,20 @@ const getCustomWebpackConfig = (configName) => {
   });
 };
 
+function getBuildDependencies() {
+  return [
+    "./pv.config.js",
+    "./webpack.config.js",
+    "./webpack.config.dev.js",
+    "./.browserslistrc",
+    "./.babelrc.json",
+    "./postcss.config.js",
+  ]
+    .map((configFile) => resolveApp(configFile))
+    .filter((filePath) => existsSync(filePath));
+}
+
 module.exports = {
   getCustomWebpackConfig,
+  getBuildDependencies,
 };

packages/pv-scripts/webpack/dev/settings/basicSettings.js

@@ -1,8 +1,18 @@
+const {
+  getBuildDependencies,
+} = require("../../../helpers/webpackConfigHelpers");
+
 module.exports = {
   mode: "development",
   devtool: "source-map",
   infrastructureLogging: {
     level: "none",
   },
   stats: "errors-only",
+  cache: {
+    type: "filesystem",
+    buildDependencies: {
+      config: getBuildDependencies(),
+    },
+  },
 };