Terraform workspace prompt doesn't work with opentofu

[Feriixu]

Describe the bug

When having terraform installed, or an alias set to terraform=tofu, everything works as expected.
However, I believe this is unintuitive and tide should automatically use tofu instead of terraform when terraform is not available.

Steps to reproduce

1. Install opentofu, but not terraform
2. Go into any terraform project with a workspace selected
3. See that the prompt fails because the terraform command is not available (tofu would be available)

fish: Unknown command: terraform
~/.config/fish/functions/_tide_item_terraform.fish (line 3): 
        terraform workspace show | string match -v default | read -l w &&
        ^~~~~~~~^
in function '_tide_item_terraform'
	called on line 11 of file ~/.config/fish/functions/_tide_1_line_prompt.fish
in function '_tide_1_line_prompt'
in command substitution