docs: add local verification notes

[gbl186]

Added a separate document with brief instructions for local project verification. The file describes the basic steps for assembly and testing, as well as collects typical problems that developers face when running locally (submodules, variable environments).

Overview

Description

Testing instructions

Types of changes

• Refactor/enhancement
• Bug fix/behavior correction
• New feature
• Breaking change
• Other, additional

Notes

Status

• Prefix PR title with WIP if necessary (changes not yet made).
• Add tests to cover changes as needed.
• Update documentation/changelog as needed.
• Verify all tests run correctly in CI and pass.
• Ready for review/merge.

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Note

Low Risk
Low risk documentation-only change that does not affect runtime behavior or build outputs.

Overview
Adds docs/LOCAL_VERIFY.md with quick-start guidance for local verification (common checks, Foundry commands) and basic troubleshooting steps (submodules, missing env vars).

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