Add minimum mint value to use mintWithEth function

[stubbsta]

Description

The TestStableToken previously had no lower limit to mint tokens. There is a possible risk for spamming because of this.
A minimum of 1 ETH has been added to the mintWithEth function, but there is no lower limit to mint if you are an approved minter.

Checklist

Ensure you completed all of the steps below before submitting your pull request:

• Added constant for minimum mint amount which is checked in mintwithEth function
• Added and verified tests for this new limit
• Update README for TestStableToken

[Copilot]

Pull Request Overview

Adds a minimum mint value requirement to the TestStableToken's mintWithEth function to prevent potential spam attacks. Previously, any amount of ETH could be used to mint tokens, creating a risk for micro-transactions that could spam the network.

• Added 1 ETH minimum requirement for the mintWithEth function
• Updated all existing tests to use compliant amounts (≥1 ETH)
• Added comprehensive test coverage for the new minimum requirement

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
test/TestStableToken.sol	Introduces MIN_MINT_WEI constant and updates mintWithETH validation logic
test/TestStableToken.t.sol	Adds new tests for minimum requirement and updates existing tests to use compliant amounts

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[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

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[jm-clius]

Great, thanks!