docs(non-qv): update docs to reflect the integration of non-quadratic…

… voting

Cleanup docs and add instructions of how to use non quadratic voting when processing and tallying
results

website/versioned_docs/version-v1.x/circuits.md

@@ -11,7 +11,7 @@ MACI has three main zk-SNARK [circuits](https://github.com/privacy-scaling-explo
 
 1. [`ProcessMessages.circom`](https://github.com/privacy-scaling-explorations/maci/blob/dev/circuits/circom/processMessages.circom), which takes a batch of encrypted messages, decrypts them, and generates a proof that the coordinator's local processing was performed correctly.
 2. [`TallyVotes.circom`](https://github.com/privacy-scaling-explorations/maci/blob/dev/circuits/circom/tallyVotes.circom), which counts votes from users' ballots, batch by batch.
-3. [`Subsidy.circom`](https://github.com/privacy-scaling-explorations/maci/blob/dev/circuits/circom/subsidy.circom), which implements [pairwise subsidy](https://hackmd.io/@chaosma/H1_9xmT2K).
+3. [`Subsidy.circom`](https://github.com/privacy-scaling-explorations/maci/blob/dev/circuits/circom/subsidy.circom), which implements [pairwise subsidy](https://hackmd.io/@chaosma/H1_9xmT2K). Please note this is an optional feature.
 
 The rest of the circuits are utilities templates that are required for the main circuits to work correctly. These include utilities such as float math, conversion of private keys, and Poseidon hashing/encryption.
 
@@ -56,6 +56,10 @@ This circuit requires the coordinator's private key, hence a proof for this circ
 
 ![ProcessMessages](/img/circuits/processMessages.svg)
 
+:::info
+A version working with non quadratic voting (non-qv) is also available. This version is called `processMessagesNonQV` and is to be used when the Poll is not using the quadratic voting feature. Note that by default MACI works with quadratic voting.
+:::
+
 #### Parameters
 
 | #   | Parameter                | Description                                          |
@@ -181,6 +185,10 @@ This method requires fewer circuit constraints than if we verified a Merkle proo
 
 ![TallyVotes](/img/circuits/tallyVotes.svg)
 
+:::info
+A version working with non quadratic voting (non-qv) is also available. This version is called `tallyVotesNonQv` and is to be used when the Poll is not using the quadratic voting feature. Note that by default MACI works with quadratic voting.
+:::
+
 #### Input signals
 
 | Input signal                            | Description                                                      |