feat: add hooks for spend/receive ecash

[alexlwn123]

• Adds useSpendEcash and useReceiveEcash to @fedimint/react
• Updates react dev app to utilize new hooks

[changeset-bot]

🦋 Changeset detected

Latest commit: 26db368

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

This PR includes changesets to release 1 package

Name	Type
@fedimint/react	Patch

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[github-actions]

Size Change: +213 B (0%)

Total Size: 7.46 MB

Filename	Size	Change
packages/react/dist/index.js	1.21 kB	+213 B (+21.28%)	🚨

ℹ️ View Unchanged

Filename	Size
packages/core-web/dist/index.js	2.7 kB
packages/core-web/dist/worker.js	679 B
packages/wasm-bundler/fedimint_client_wasm_bg.wasm	3.73 MB
packages/wasm-web/fedimint_client_wasm_bg.wasm	3.73 MB

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