[idea] Configurable base branch in the herdr config for worktree create

[jadesym]

idea / problem

I want the default base branch on worktree create to be configurable to origin/main

Right now if I do worktree create it will use the current branch that I'm on to create the branch.
It's also slightly more annoying to have to explicitly set the --base origin/main

I see a previous request for something similar was suggested to use a plugin instead:
#397
That being said I feel like this use case isn't to dynamically created based upon origin head.
This is just hardcoding to a very specific primary branch (i.e. main, master, origin/main, origin/master) which I feel is a much more common use case that origin head that may warrant a configuration value.

requested change

Support a configuration in the herdr configuration for a default base branch in case --base is not provided when creating worktree

why you want this

I would like to not have to set the base branch when 95% of my worktrees are meant to be created from the primary origin branch.