Add ripgrep config

Now it's possible to use ripgrep without worrying about files with
really long lines taking up the entire screen.

ripgrep/.config/ripgrep/config

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+# Don't show results for very long lines (e.g. minified files)
+--max-columns=200

ripgrep/README.md

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+# ripgrep
+
+[ripgrep][ripgrep] is a modern version of grep.
+
+## Use Cases
+
+ripgrep can be used to:
+
+- Search for strings in projects
+
+You should not use ripgrep if:
+
+- You should use ripgrep.
+
+[ripgrep]: https://github.com/BurntSushi/ripgrep