FEAT: Paper Templates for GitHub Pages

[dev-onejun]

Add "Paper Templates for GitHub Pages" to/from the "Templates > Articles" section.

Short pitch

Please refer to the issue #57

Checklist

• I have read and understood the contribution guidelines.
• If the entry is a software:
  • it should be maintained (at least a commit / a release in the past 3 years),
  • it is open-source with appropriate license
• Table of contents has been updated (if a section is added / removed).
• Contents have been sorted alphabetically.