build: create npm package (#2151)

* build: create npm package

This commit makes sure that the common modules of the GRS package can be
imported as an npm package.

* feat: export card render functions

* style: update formatting

src/common/index.js

@@ -0,0 +1,30 @@
+export { blacklist } from "./blacklist.js";
+export { Card } from "./Card.js";
+export { createProgressNode } from "./createProgressNode.js";
+export { i18n } from "./i18n.js";
+export { icons } from "./icons.js";
+export { retryer } from "./retryer.js";
+export {
+  ERROR_CARD_LENGTH,
+  renderError,
+  encodeHTML,
+  kFormatter,
+  isValidHexColor,
+  parseBoolean,
+  parseArray,
+  clampValue,
+  isValidGradient,
+  fallbackColor,
+  request,
+  flexLayout,
+  getCardColors,
+  wrapTextMultiline,
+  logger,
+  CONSTANTS,
+  CustomError,
+  MissingParamError,
+  measureText,
+  lowercaseTrim,
+  chunkArray,
+  parseEmojis,
+} from "./utils.js";