Initial commit of ripgrep

Summary: The inclusion of ripgrep fixes T4558

Test Plan:
Installed locally
Confirmed version number with rg --version
Ran some search tests

Reviewers: Triage Team, JoshStrobl

Reviewed By: Triage Team, JoshStrobl

Maniphest Tasks: T4558

Differential Revision: https://dev.solus-project.com/D1414