Simplify codebase by splitting patch::create::run() into patch::create::run() and
patch::update::run().
Patch has the subcommands `create` and `update` but both use the same
method to do the heavy lifting. Spitting the code allows us to detangle
the code path making it easier to follow.
Also, reduce cognitive load by minimizing the amount of variables used
and isolating them to utility functions. For instance, `head_branch` can be passed to
these methods instead of `head_oid` and `head_branch`.
Signed-off-by: Slack Coder <slackcoder@server.ky>
Slack Coder