ci: upgrade wasm-pack to 0.14.0

[darioAnongba]

Summary

Upgrade wasm-pack from 0.13.1 to 0.14.0. Currently CI shows:

[WARN]: ⚠️ There's a newer version of wasm-pack available, the new version is: 0.14.0

Problem

The current install method uses the installer/init.sh script from the wasm-pack repo, but this script was removed in v0.14.0. We're pinned to an old commit SHA that still has it.

Options

1. Download binary from GitHub releases — fastest, no build step:

   curl -L https://github.com/rustwasm/wasm-pack/releases/download/v0.14.0/wasm-pack-v0.14.0-x86_64-unknown-linux-musl.tar.gz | tar xz
   mv wasm-pack-*/wasm-pack /usr/local/bin/

2. cargo install wasm-pack — slower (~2-3 min compile) but always latest
3. cargo binstall wasm-pack — fast binary install if cargo-binstall is available

Recommend option 1 for speed.