chore: update research section

src/SUMMARY.md

@@ -2,10 +2,10 @@
 - [RLN](./rln.md)
 - [Overview](./overview.md)
   - [What is RLN](./what_is_rln.md)
-  - [RLN in details](./protocol_spec.md)
+  - [RLN in details](./rln_in_details.md)
   - [Formal spec](./formal_spec.md)
   - [Smart-contract](./smart_contract.md)
-  - [RLN Uses](./uses.md)
+  - [RLN Uses](./rln_uses.md)
 - [Shamir's Secret Sharing](./sss.md)
 - [Research](./research.md)
   - [KZG-RLN](./kzg_rln.md)

src/kzg_rln.md

@@ -1 +1,5 @@
 # KZG-RLN
+
+Read [this post](https://zkresear.ch/t/rln-on-kzg-polynomial-commitment-scheme-cross-posted/114) on zkresear.ch.
+
+WIP in the [kzg-rln](https://github.com/Rate-Limiting-Nullifier/kzg-rln) repo.

src/noir_rln.md

@@ -1 +1,3 @@
 # Noir-RLN
+
+WIP in the [noir-rln](https://github.com/Rate-Limiting-Nullifier/noir-rln) repo.

src/research.md

@@ -1 +1,6 @@
 # Research
+
+In addition to production-ready **circom-rln** version of RLN protocol, there is also wip on **RLN** R&D to reduce proving time and have bigger choice of implementations. 
+For now you can follow the work on:
+* [kzg-rln](./kzg_rln.md);
+* [noir-rln](./noir_rln.md).