Add documentation on how to make wrangler ignore .env files

[dario-piotrowicz]

Warning

This PR should not be merged until the changes in cloudflare/workers-sdk#12724 are released
(the PR will be kept in draft until then)

Summary

This PR adds some very simple documentation telling users how they can make wrangler ignore .env files

[github-actions]

This PR requires additional review attention because it affects the following areas:

Partials

This PR updates partial files, which are pieces of content used across multiple files in our Render component.

• workers/secrets-in-dev - view affected files

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/workers/wrangler/	@cloudflare/wrangler, @irvinebroque, @cloudflare/pcx-technical-writing
/src/content/partials/workers/	@cloudflare/workers-docs, @GregBrimble, @irvinebroque, @mikenomitch, @WalshyDev, @cloudflare/deploy-config, @cloudflare/pcx-technical-writing, @cloudflare/wrangler, @mattietk

[github-actions]

Preview URL: https://db1ac53e.preview.developers.cloudflare.com
Preview Branch URL: https://dario-ignore-env-file.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/wrangler/system-environment-variables/	https://dario-ignore-env-file.preview.developers.cloudflare.com/workers/wrangler/system-environment-variables/