GSoC-particpants: add file with partial info about participants

[sivaraam]

This file is being collected to gather the information about the participants that have contributed to Git via GSoC, an outreach program conducted by Google each year. This would serve as a helpful reference.

The intention is not to restrict gathering the information only for GSoC. We've started gather this with GSoC. We'll expand to also gather information of participants who've contributed via Outreachy.

Related issue: #671

[chriscool]

The commit subject is using "GSoC-particpants:" instead of GSoC-participants:" (missing "i").

[chriscool]

From _posts/2023-06-30-edition-100.markdown:

• Kousik Sanagavarapu will work on the Unify ref-filter formats with other pretty formats project. Kousik will be co-mentored by Hariom Verma and Christian Couder. Some details about his work on the project could be found in his blog.
• Shuqi Liang will work on the More Sparse Index Integrations project. Shuqi will be mentored by Victoria Dye. Further details about the project and updates on progress can be found on Shuqi's blog.

[chriscool]

From _posts/2022-06-30-edition-88.markdown:

• Abhradeep Chakraborty, who works on
  "Reachability bitmap improvements",
  has published his latest post
  on his Medium blog.

• Shaoxuan Yuan, who works on "More Sparse Index Integrations"
  has published his latest post
  on his website.

• Jaydeep Das, who works on "Unify ref-filters with other pretty formats"
  has published his latest post
  on his website.

[chriscool]

From _posts/2021-05-27-edition-75.markdown:

• ZheNing Hu will work on the
  Use ref-filter formats in git cat-file
  project. He will be co-mentored by Hariom Verma and Christian
  Couder. His first blog post about it is up.

• Atharva Raykar will work on the
  Finish converting submodule to builtin
  project. He will be co-mentored by Shourya Shukla and Christian
  Couder. His first blog posts about it are also up.

[chriscool]

From _posts/2020-05-28-edition-63.markdown:

• Abhishek Kumar will work on
  Implement Generation Number v2.
  He will be co-mentored by Jakub Narebski and Derrick Stolee.
  More information is available on his
  proposal
  and blog.

• Hariom Verma will work on
  Unify ref-filter formats with other --pretty formats.
  He will be co-mentored by Heba Waly and Christian Couder.
  More information is available on his
  proposal
  and blog.

• Shourya Shukla will work on
  Convert submodule to builtin.
  He will be co-mentored by Kaartic Sivaraam and Christian Couder.
  More information is available on his
  proposal
  and blog.

[chriscool]

Since 2015, Git Rev News should have information about all the GSoC contributors, but yeah, it can be helpful to get information about all the previous contributors.

An issue with this might be that we might not want to publicize too much information about the contributors who were failed even though this could be useful information.