fix(scripts): Consolidate Devnet Scripts

[refcell]

Summary

Consolidate devnet script directories

Context: PR #589 comment

Problem

There are two separate directories for devnet-related scripts:

• devnet/scripts/
• scripts/devnet/

This is confusing and makes it unclear where devnet scripts should live.

Proposed Solution

Consolidate all devnet scripts into a single location. Options:

1. [Preferred] Move everything to devnet/scripts/ (keeps devnet self-contained)
2. Move everything to scripts/devnet/ (keeps all scripts in one top-level dir)