feat(terraform): add terraform init -upgrade alias

[nitrocode]

Standards checklist:

• The PR title is descriptive.
• The PR doesn't replicate another PR which is already open.
• I have read the contribution guide and followed all the instructions.
• The code follows the code style guide detailed in the wiki.
• The code is mine or it's from somewhere with an MIT-compatible license.
• The code is efficient, to the best of my ability, and does not waste computer resources.
• The code is stable and I have tested it myself, to the best of my abilities.
• If the code introduces new aliases, I provide a valid use case for all plugin users down below.

Changes:

• add alias for tfiu to init and upgrade all local providers by ignoring the existing and replacing the terraform lock file
  • this is very common when working with providers that update frequently such as the aws provider
• add alias for tw and tws workspace commands to interact with workspaces and easily switch between them

Other comments:

• terraform docs
  • https://developer.hashicorp.com/terraform/cli/commands/init#upgrade
  • https://developer.hashicorp.com/terraform/cli/commands/workspace
  • https://developer.hashicorp.com/terraform/cli/commands/workspace/select
• similar pr with all the workspace aliases Added more terraform aliases #10833 so removing this from the pr
• read over introducing new aliases https://github.com/ohmyzsh/ohmyzsh/blob/master/CONTRIBUTING.md#new-plugin-aliases
• read over wiki https://github.com/ohmyzsh/ohmyzsh/wiki/Code-Style-Guide

[robbyrussell]

Appreciate the contribution, @nitrocode! Sorry it took us a while to get to this. ✌️

[nitrocode]

Thank you @robbyrussell.

No worries. Better late than never 😁