Docs: Add new branch types and update prefix rules for PR titles

[nick-y-ito]

Overview

This PR adds new branch types (refactor, fix, test) and updates the prefix rules for PR titles to match one of the branch types.

Changes

• Added the following branch types to the "Types of Branches" section of CONTRIBUTING.md
  • refactor
  • fix
  • test
• Updated the prefix rules for PR titles to match one of the branch types

Review Points

• Please take a look at the reference below to know how I came up with new branch type names.

References

• Chat History with ChatGPT

Notes

• This PR is not based on any issue.

Assignee Checklist:

• [x] The naming convention of the PR title is correct (See the comment at the top of this template)
• [x] The base branch is correct (See: Types of Branches)
• [x] The branch name follows the Branch Naming Conventions
• [x] The correct assignees and reviewers have been designated for this PR
• [x] The coding style follows the Coding Style Guide
• [x] All the related issues are associated with this PR
• [x] All criteria in the associated issues are met (please tick the checkboxes)
• [x] My changes do not generate new warnings or errors (especially in the console)

Reviewer Checklist:

• [x] Double-check the "Assignee Checklist"
• [ ] The code follows the generic best practices and our Coding Style Guide
• [x] The code is well-commented and easy to understand
• [ ] The UI changes accurately reflect the provided design

[nick-y-ito]

Thank you for all your reviews 😄