[miniflare] Add logging of emails sent by workers to .wrangler/tmp.

[tpmmorris]

Add storing of emails sent by workers to temporary directory within project.

Previously, email send logs were only saved to a the system's temporary directory. This new change keeps this location to prevent breaking, but adds an additional location (for wrangler sending a simple text email: .wrangler/tmp/email/<session-id>/email-text/<message-uuid>). This will improve user's ability to test their workers' email capability. Implementation of feature request #13809.

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• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows: N/A
  • Additional testing not necessary because: N/A
• Public documentation
  • Cloudflare docs PR(s): [miniflare] Update sending.mdx to account for new email logging location. cloudflare-docs#31970
  • Documentation not necessary because: N/A

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[changeset-bot]

🦋 Changeset detected

Latest commit: 5035f85

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

This PR includes changesets to release 7 packages

Name	Type
miniflare	Patch
wrangler	Patch
@cloudflare/deploy-helpers	Patch
@cloudflare/pages-shared	Patch
@cloudflare/runtime-types	Patch
@cloudflare/vite-plugin	Patch
@cloudflare/vitest-pool-workers	Patch

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[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• .changeset/clever-months-speak.md: [@cloudflare/wrangler]
• packages/miniflare/src/index.ts: [@cloudflare/wrangler]
• packages/miniflare/src/plugins/core/index.ts: [@cloudflare/wrangler]
• packages/miniflare/src/plugins/email/index.ts: [@cloudflare/wrangler]
• packages/miniflare/src/plugins/shared/index.ts: [@cloudflare/wrangler]
• packages/miniflare/src/workers/email/send_email.worker.ts: [@cloudflare/wrangler]
• packages/miniflare/test/plugins/email/index.spec.ts: [@cloudflare/wrangler]
• packages/wrangler/src/api/integrations/platform/index.ts: [@cloudflare/wrangler]
• packages/wrangler/src/api/startDevWorker/LocalRuntimeController.ts: [@cloudflare/wrangler]
• packages/wrangler/src/dev/miniflare/index.ts: [@cloudflare/wrangler]

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@cloudflare/autoconfig

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create-cloudflare

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@cloudflare/deploy-helpers

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@cloudflare/vite-plugin

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@cloudflare/workers-utils

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wrangler

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commit: bd8a6ed

[emily-shen]

not sure if you've done this already, but it can be really useful to use our fixtures to play around and test things manually - have a look at fixtures/email-worker