Add Problem List and Solution Link in README

[ruichen199801]

Is your feature request related to a problem? Please describe.
The current feature offers a great way to backup solutions and track progress via commits, which I really appreciate. However, it would even be better to automate the process of index creation so that one can navigate through solved problems and find solution in O(1).

Describe the solution you'd like
When pushing new problem to GitHub, extract information such as problem no., title, url, (optionally) difficulty, tags, and add them as a new row to a markdown table in the parent README file.

Ideally, the solution link on Github should be included. However, since the url is only formed after commit, not sure if there is an elegant way of doing it.

Describe alternatives you've considered
Doing it manually.

Additional context
Not any.