feat: implement build system and development workflow

- Add npm scripts for CSS/JS compilation (build:css, build:js, build)
- Create PowerShell build automation script
- Document development workflow in README
- Add troubleshooting guide for build issues
- Specify proper file structure and compilation process

Supports Tailwind CSS v3.4.0 and esbuild bundling with source maps.

node_modules/postcss-load-config/src/plugins.js

@@ -0,0 +1,85 @@
+'use strict'
+
+const req = require('./req.js')
+
+/**
+ * Plugin Loader
+ *
+ * @private
+ * @method load
+ *
+ * @param  {String} plugin PostCSS Plugin Name
+ * @param  {Object} options PostCSS Plugin Options
+ *
+ * @return {Function} PostCSS Plugin
+ */
+const load = (plugin, options, file) => {
+  try {
+    if (
+      options === null ||
+      options === undefined ||
+      Object.keys(options).length === 0
+    ) {
+      return req(plugin, file)
+    } else {
+      return req(plugin, file)(options)
+    }
+  } catch (err) {
+    throw new Error(`Loading PostCSS Plugin failed: ${err.message}\n\n(@${file})`)
+  }
+}
+
+/**
+ * Load Plugins
+ *
+ * @private
+ * @method plugins
+ *
+ * @param {Object} config PostCSS Config Plugins
+ *
+ * @return {Array} plugins PostCSS Plugins
+ */
+const plugins = (config, file) => {
+  let plugins = []
+
+  if (Array.isArray(config.plugins)) {
+    plugins = config.plugins.filter(Boolean)
+  } else {
+    plugins = Object.keys(config.plugins)
+      .filter((plugin) => {
+        return config.plugins[plugin] !== false ? plugin : ''
+      })
+      .map((plugin) => {
+        return load(plugin, config.plugins[plugin], file)
+      })
+  }
+
+  if (plugins.length && plugins.length > 0) {
+    plugins.forEach((plugin, i) => {
+      if (plugin.default) {
+        plugin = plugin.default
+      }
+
+      if (plugin.postcss === true) {
+        plugin = plugin()
+      } else if (plugin.postcss) {
+        plugin = plugin.postcss
+      }
+
+      if (
+        // eslint-disable-next-line
+        !(
+          (typeof plugin === 'object' && Array.isArray(plugin.plugins)) ||
+          (typeof plugin === 'object' && plugin.postcssPlugin) ||
+          (typeof plugin === 'function')
+        )
+      ) {
+        throw new TypeError(`Invalid PostCSS Plugin found at: plugins[${i}]\n\n(@${file})`)
+      }
+    })
+  }
+
+  return plugins
+}
+
+module.exports = plugins