Add wrangler delete for scripts

[ocsfrank]

This PR adds a command wrangler delete that allows to delete a Workers script.

wrangler delete will delete a script based on the script name and account ID found in the wrangler.toml file.

Without any flags, the command will ask for confirmation steps when deleting the script, and any bound Durable Objects.
It's also possible to pass a flag --force to skip all the confirmation steps. WARNING: --force will also delete the Durable Objects bound to a script.

Should solve #210.

[ocsfrank]

Changed to read all project info from wrangler.toml and added a PR to cloudflare-rs (cloudflare/cloudflare-rs#166) for adding the API endpoints.

[JacobMGEvans]

Thanks for creating this PR! Wrangler v1 is now deprecated and support is only being provided for critical updates or security concerns. As such, we are closing this PR.

New versions of Wrangler are maintained in the workers-sdk repo. If you are running into a similar issue with wrangler v2, please report it or create a new PR in the workers-sdk repo. For more info about wrangler v1 deprecation, please check out our blog post.