[wrangler] Make wrangler dev --experimental-local the default 🎉 (#3224)

* Use Miniflare 3 for `--local` and deprecate `--experimental-local`

...and make `--local` the default and add `--remote` flag

* Revert "fix: c3 arguments"

This reverts commit 13abe44.

Author: mrbbot

.changeset/khaki-oranges-obey.md

@@ -0,0 +1,9 @@
+---
+"wrangler": major
+---
+
+feature: enable local development with Miniflare 3 and `workerd` by default
+
+`wrangler dev` now runs fully-locally by default, using the open-source Cloudflare Workers runtime [`workerd`](https://github.com/cloudflare/workerd).
+To restore the previous behaviour of running on a remote machine with access to production data, use the new `--remote` flag.
+The `--local` and `--experimental-local` flags have been deprecated, as this behaviour is now the default, and will be removed in the next major version.

.gitignore

@@ -197,3 +197,5 @@ packages/quick-edit/web
 # VSCode Theme
 *.vsix
 vendor/vscode
+
+.wrangler/