Feature request: Prompt user to commit preview

[robert-m]

I use --preview all the time to view what the commit message will be before commiting. Adding a new flag --prompt to preview and then prompted if user wants to commit message.

For example;

Summarize the commit message use gpt-3.5-turbo model
We are trying to summarize a git diff
We are trying to summarize a title for pull request
================Commit Summary====================

feat: Add preview flag and remove disableCommit flag in commit command and template file.

- Add a `preview` flag to the `commit` command
- Remove the `disbaleCommit` flag from the `prepare-commit-msg` template file

==================================================

Commit preview summary? : y

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Write the commit message to .git/COMMIT_EDITMSG file

[appleboy]

I will take it.

[tisfeng]

Good idea 😃