implemented a lot of features

lib/yenc/index.ts

@@ -0,0 +1,7 @@
+/**
+ * yEnc decoding, independent of AdonisJS. See CONCEPT.md (D4, D10).
+ */
+export { parseYencMeta, inferTotalParts, type YencMeta, type YencBegin, type YencPart, type YencEnd } from './meta.js'
+export { decodeSegment, crc32Hex, combineCrc32, type DecodedSegment, type DecodeOptions } from './decode.js'
+export { YencFile } from './yenc_file.js'
+export { YencError, YencCrcError } from './errors.js'