Shield Wallet installable app 0.1.0

Corresponding app and dependency source. From web/: npm ci --ignore-scripts; npm run build:wallet-app. See web/wallet-app/README.md. The build requires the original published extension source archive for verified third-party licensing/source, as documented there. This archive includes that dependency source in third-party/packages and upstream snarkjs source in web/extension/vendor. No wallet data or secrets are included.
