feat: convert aws-cli to wasip2 component

[eduardomourar]

Converts the AWS CLI from a WASI Preview1 module to a native wasm32-wasip2 component with a dedicated WASI HTTP client, and rebuilds the web/browser integration around it.

• Component architecture: builds aws-cli as a wasip2 component with auto-generated bindings, adds a separate integration-tests crate running against wasmtime (with build caching), and updates CI to build/test multiple components.
• New AWS services: adds read-only commands for EC2, ECS, EKS, RDS, Redshift, Lambda, IAM, KMS, CloudWatch, CloudTrail, CloudFront, DynamoDB, ELBv2, EFS, ElastiCache, EventBridge, GlI Gateway v2, Athena, Cognito IdP, and AWS Config — each with its own tests.
• Browser shell: migrates off wasm-webterm to a custom TypeScript terminal, pulls in a local-echo library, adds advanced bash-like features (pipes, command exit codes), and adds symlink support and additional filesystem/symlink e2e tests.
• Browser extension: adds a new browser extension package with manifest, icons, and CORS handling for extension requests.
• Tooling/deps: upgrades to React 19, bumps preview2-shim and wasmtime, adds Playwright e2e testing, and migrates the aws-cli npm package to TypeScript.