add initial marp implementation with sample content and build configuration

node_modules/bare-url/lib/errors.js

@@ -0,0 +1,38 @@
+module.exports = class URLError extends Error {
+  constructor(msg, code, fn = URLError) {
+    super(`${code}: ${msg}`)
+    this.code = code
+
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, fn)
+    }
+  }
+
+  get name() {
+    return 'URLError'
+  }
+
+  static INVALID_URL(msg = 'Invalid URL') {
+    return new URLError(msg, 'INVALID_URL', URLError.INVALID_URL)
+  }
+
+  static INVALID_URL_SCHEME(msg = 'Invalid URL') {
+    return new URLError(msg, 'INVALID_URL_SCHEME', URLError.INVALID_URL_SCHEME)
+  }
+
+  static INVALID_FILE_URL_HOST(msg = 'Invalid file: URL host') {
+    return new URLError(
+      msg,
+      'INVALID_FILE_URL_HOST',
+      URLError.INVALID_FILE_URL_HOST
+    )
+  }
+
+  static INVALID_FILE_URL_PATH(msg = 'Invalid file: URL path') {
+    return new URLError(
+      msg,
+      'INVALID_FILE_URL_PATH',
+      URLError.INVALID_FILE_URL_PATH
+    )
+  }
+}