redirect plan operations to dashboard

[gris]

redirect

turso org billing
turso plan select
turso plan upgrade
turso plan overages enable
turso plan overages disable

to https://app.turso.tech/$ORG/settings/billing

also, updates action versions

[athoscouto]

I wouldn't say I like the idea of replacing all billing-related commands with opening the web app. This adds a breaking change that is avoidable.

If we don't want plan management on the CLI anymore, I suggest taking the following approach:

• Hide the current commands, keeping them working as they are today but not advertising them. The exception would be the billing portal, which has a similar behavior today.
• Create a new and more specific command to manage your turso plan, this would behave the same way as turso org billing, opening up the web app. I suggest turso plan manage.

I don't see a reason to remove plan management logic from the CLI though - which may be totally on me since I'm not following billing-related discussions. If we still want to keep them just changing the behavior of the billing command should be enough.