Fix published package names in docs

[ihsraham]

Summary

• replace the nonexistent @tetherto/wdk-core package name with @tetherto/wdk
• correct the ERC-4337 package name to @tetherto/wdk-wallet-evm-erc-4337 across rendered docs, the wallet chooser, the public AI docs bundle, and the WDK skill

Why

The previous package identifiers return 404 from the public npm registry, which can lead developers and coding agents to copy install commands for packages that do not exist.

Validation

• git diff --check
• npm run check:meta
• npm run check:redirects
• LINK_CHECK_EXTERNAL=false npm run check:links
• npm run test:llm-md
• npm run build on Node.js 22.22.2
• verified the corrected registry endpoints return 200 and the invalid endpoints return 404

[ihsraham]

Closing as superseded by #212. The published package-name corrections across the rendered docs, wallet chooser, public AI documentation bundle, and WDK skill are included there. Please continue review on #212.