Bare js example app & updated docs

[alexlwn123]

• Added an additional example app for a bare js + html static site. (/examples/bare-js)
• Updated README
• Added TESTING.md & ARCHITECTURE.md

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 9b68740e25d7ea00e2248deafa71a02ead280eec

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------------------ | ----- | | @fedimint/core-web | Patch |

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[github-actions[bot]]

Size Change: 0 B

Total Size: 7.23 MB

ℹ️ View Unchanged

| Filename | Size | | :--- | :---: | | `packages/core-web/dist/index.js` | 2.21 kB | | `packages/core-web/dist/worker.js` | 646 B | | `packages/wasm-bundler/fedimint_client_wasm_bg.wasm` | 3.61 MB | | `packages/wasm-web/fedimint_client_wasm_bg.wasm` | 3.61 MB |

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