feat: add zk toolbox (#2005)

## What ❔

- Add zk toolbox 

## Why ❔

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are the principles behind them? -->
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## Checklist

<!-- Check your PR fulfills the following items. -->
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- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [x] Tests for the changes have been added / updated.
- [x] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk fmt` and `zk lint`.
- [x] Spellcheck has been run via `zk spellcheck`.

---------

Signed-off-by: Danil <[email protected]>
Co-authored-by: Ramon "9Tails" Canales <[email protected]>
Co-authored-by: Danil <[email protected]>

.gitignore

@@ -10,7 +10,7 @@
 node_modules
 *.log
 target
-a.out 
+a.out
 .gitconfig
 cobertura.xml
 tags
@@ -30,6 +30,7 @@ Cargo.lock
 !/Cargo.lock
 !/infrastructure/zksync-crypto/Cargo.lock
 !/prover/Cargo.lock
+!/zk_toolbox/Cargo.lock
 
 /etc/env/target/*
 /etc/env/.current