Migrate fastled-wasm to fastled/cli

[zackees]

Summary

fastled-wasm should migrate to fastled/cli as its new home.

Rationale

• Consolidates FastLED's command-line tooling under the official fastled GitHub organization.
• Aligns the WASM compiler with the broader FastLED CLI surface (compile, flash, autoresearch, etc.) rather than keeping it siloed under a personal namespace.
• Gives users a single canonical entry point for FastLED CLI workflows.

Scope

• Move the repository / codebase to fastled/cli (new repo) as the WASM subcommand, or merge functionality there.
• Update package name, PyPI distribution, and install instructions.
• Redirect issues and pin a migration notice on zackees/fastled-wasm.
• Update all documentation and cross-links in the main FastLED/FastLED repo that reference zackees/fastled-wasm.

Open questions

• Preserve zackees/fastled-wasm as an archived mirror, or fully deprecate?
• Single fastled CLI with subcommands (fastled wasm, fastled compile, ...) vs. per-tool binaries?
• PyPI package rename strategy — deprecate old, publish new, or transitional meta-package?