implemented a lot of features

lib/newznab/index.ts

@@ -0,0 +1,5 @@
+/**
+ * Newznab API formatting, independent of AdonisJS. See CONCEPT.md (D23).
+ */
+export { CATEGORIES, categoryLabel, expandCategories, parentCategory } from './categories.js'
+export { capsXml, errorXml, resultsXml, type NewznabItem, type NewznabServer } from './xml.js'