chore(deposit): add initial folder structure (#15294)

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## **Description**

This PR adds the initial code domain and codeowners for the Deposit
feature.

## **Related issues**

Fixes:

## **Manual testing steps**

1. Go to this page...
2.
3.

## **Screenshots/Recordings**

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### **Before**

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### **After**

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## **Pre-merge author checklist**

- [ ] I’ve followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
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Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
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in the ticket it closes and includes the necessary testing evidence such
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Author: wachunei

.github/CODEOWNERS

@@ -38,6 +38,7 @@ metro.transform.js @MetaMask/mobile-platform @MetaMask/snaps-devs
 # Ramps Team
 app/components/UI/Ramp/              @MetaMask/ramp
 app/reducers/fiatOrders/             @MetaMask/ramp
+app/components/UI/Deposit/           @MetaMask/ramp
 
 # Confirmation Team
 app/components/Views/confirmations                          @MetaMask/confirmations