V11 Stack Upgrade

[arch1995]

Motivation and Context

Jira Link

https://consensyssoftware.atlassian.net/browse/W3APD-5248

Description

Stack upgrade:

• Remove umd build & webpack
• Upgrade all deps to latest
• Drop node 20 support. All repos .nvmrc min as node 22
• keep node 24 as active and all lock files to point to node 24
• Remove buffer
• Updates messageStreams, mux etc
• Removes tts-custom-error, enc-utils, @ethereumjs/util, end-of-stream
• Remove bn.js
• Removes starkey
• Update demo apps

How has this been tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project. (run lint)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code requires a db migration.

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Note

Low Risk
Mostly tooling/documentation and demo HTML cleanup; main risk is CI/local dev breakage for contributors not on Node 24.

Overview
Updates the project’s supported runtime by moving CI and local tooling to Node 24.x (CI matrix and .nvmrc), and aligns README requirements/build artifact paths accordingly.

Adds a .cursor/worktrees.json worktree setup hook, and cleans up the Vue example index.html by removing the Buffer/process polyfill snippet and reformatting/modernizing the document header.

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