docs: add warning to use safe password for keystore (#1173)

Author: JuArce

docs/1_introduction/2_zkquiz.md

@@ -26,6 +26,10 @@ Next, we will see how to execute ZKQuiz to get your own ZKQuiz NFT!
 
 ### 1 - Create Keystore
 
+{% hint style="warning" %}
+When creating a new wallet keystore and private key please use strong passwords for your own protection.
+{% endhint %}
+
 You can use cast to create a local keystore.
 If you already have one, you can skip this step.
 

docs/3_guides/0_submitting_proofs.md

@@ -23,6 +23,10 @@ If you already have a keystore file, you can ignore this section and start sendi
 
 You need to have installed [Foundry](https://book.getfoundry.sh/getting-started/installation).
 
+{% hint style="warning" %}
+When creating a new wallet keystore and private key please use strong passwords for your own protection.
+{% endhint %}
+
 - If you are creating a new account, create a private key with:
 
     ```bash

docs/3_guides/5_using_zkrust.md

@@ -41,6 +41,10 @@ make install
 
 ### 2. Generate a keystore:
 
+{% hint style="warning" %}
+When creating a new wallet keystore and private key please use strong passwords for your own protection.
+{% endhint %}
+
 You can use cast to create a local keystore.
 If you already have one, you can skip this step.
 

docs/3_guides/6_setup_aligned.md

@@ -284,6 +284,10 @@ Changing operator keys:
 
 Operator keys can be changed if needed.
 
+{% hint style="warning" %}
+When creating a new wallet keystore and private key please use strong passwords for your own protection.
+{% endhint %}
+
 To create a keystore, run:
 
 ```bash