Allow to define base and target folders paths

[jchanam]

Right now, when the base and the target are created, the folder path is hardcoded. This is also a relative path to the working directory.

argocd-diff-preview/src/branch.rs

Lines 19 to 25 in b848e2f

	pub fn folder_name(&self) -> &str {
	match self.branch_type {
	BranchType::Base => "base-branch",
	BranchType::Target => "target-branch",
	}
	}
	}

I'd suggest to have an environment variable / flag to allow these paths to be overwritten, so we can run the app from any working directory.

[dag-andersen]

Hi @jchanam,
Thank you for your interest in the project!
Am I correct in assuming that this feature would be most useful when running the binary directly (and not in Docker)?

[jchanam]

I think it'd be useful in both cases. Being able to configure via flag/env where the app will read/write files adds flexibility for users.