feat(forge): allow uppercase abbreviations in mixed-case-variable lint

[nuul-dev]

Component

Forge

Describe the feature you would like

The mixed-case-variable lint rule currently flags variables like marketID, optionID, userID as violations, suggesting they should use mixedCase.

However, keeping common abbreviations in uppercase (ID, URL, URI, API, etc.) is a widely accepted convention in camelCase/mixedCase naming. Writing marketId incorrectly suggests "Id" is a word rather than an abbreviation for "Identifier".
Proposed solution:
Add an exception list for common abbreviations that should remain uppercase when appearing at the end or middle of an identifier:

• ID
• URL
• URI
• API
• JSON, XML, HTML, HTTP, HTTPS

Additional context

Current lint output example:

note[mixed-case-variable]: mutable variables should use mixedCase
  --> src/FPMMRouterV2.sol:35:11
   |
35 |         uint256 marketID,
   |         --------

This creates noise in lint output for codebases following the uppercase abbreviation convention.