feat(detail page): add a detail page

[ryanrw]

As we stated in the CONTRIBUTING.md that we need the detail page.

Unfortunately, we don't have actual design for this page (you can take a look at the design (Figma))

The goal of the detail page is to give founder an area of great, motivational, inspirational, and curiousfulness in detail that may convince visitors to make PR to make project better.

We also provided you some type def for help you with this:

• inspiredBy?: string; The link to the website or github repository that the project has been inspired by
• keywords: string[]; keywords assisting visitors with further googling
• descriptionMarkdown: string; project's description the founder would like to illustrate (w/ markdown functionallity)
• contributingMarkdown?: string; contributing guideline, typically CONTRIBUTING.MD linkout, or you can state it in markdown format.

You can use the PR #10 for example of your work.