docs: Update README.md

Add table for crate description

Author: darkseid-is

README.md

@@ -2,8 +2,10 @@
 
 This repository contains multiple primitive crates used by the ParsePlz parsers.
 
-- `body-plz`: Body abstraction
-- `buffer-plz`: Buffer and cursor for parsing
-- `header-plz`: Header abtraction
-- `mime-plz`: Mime detection
-- `protocol-traits-plz`: Abtraction over the protocol
+Crate       | Description
+:-----      | :-----
+body-plz    | Body abstraction
+buffer-plz  | Buffer and cursor for parsing
+header-plz  | Header abtraction
+mime-plz    | Mime detection
+protocol-traits-plz | Abtraction over the protocol