[Feature] Support of custom dynamic branch names

Currently, the only way to control the branch name is via `branch_prefix`[ prop](https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md#inputs) but it is not enough. In our company, we need to set the branch name based on Jira ticket Id and it is something like this:`{feature|bug|etc}/{ProjectName}-{JiraTicketId}-{description}`, otherwise a CI check fails the work.

It would be great if we can control the branch name through the prompt instead of inflexible props.