Update Caulk+ notes, add initial FRI & Nova notes

Update Caulk notes with minimal Caulk+ overview.
Add initial notes on FRI & Nova.

paper-notes.bib

@@ -57,3 +57,28 @@
       note = {\url{https://eprint.iacr.org/2022/957}},
       url = {https://eprint.iacr.org/2022/957}
 }
+
+@misc{fri,
+	author = {Eli Ben-Sasson and Iddo Bentov and Yinon Horesh and Michael Riabzev},
+	title = {Fast Reed-Solomon Interactive Oracle Proofs of Proximity},
+	year = {2018},
+	note = {\url{https://eccc.weizmann.ac.il/report/2017/134/}},
+	url = {https://eccc.weizmann.ac.il/report/2017/134/}
+}
+@misc{cryptoeprint:2022/1216,
+      author = {Ulrich Haböck},
+      title = {A summary on the FRI low degree test},
+      howpublished = {Cryptology ePrint Archive, Paper 2022/1216},
+      year = {2022},
+      note = {\url{https://eprint.iacr.org/2022/1216}},
+      url = {https://eprint.iacr.org/2022/1216}
+}
+
+@misc{cryptoeprint:2021/370,
+      author = {Abhiram Kothapalli and Srinath Setty and Ioanna Tzialla},
+      title = {Nova: Recursive Zero-Knowledge Arguments from Folding Schemes},
+      howpublished = {Cryptology ePrint Archive, Paper 2021/370},
+      year = {2021},
+      note = {\url{https://eprint.iacr.org/2021/370}},
+      url = {https://eprint.iacr.org/2021/370}
+}