Explicitly refer to language folder READMEs in the root README

Added a note to check the readme for detailed descriptions of available languages.

Author: krishnangovindraj

README.md

@@ -1,3 +1,5 @@
 # typedb-graph-utils
-Graph integrations for TypeDB. Available languages:
+Graph integrations for TypeDB. Please check the readme within the directory for the language you're interested in for a more detailed description.
+
+Available languages:
 * [python](python/README.md)