docs(contrib): add GOVERNANCE and MAINTAINERS files (#2938)

docs/MAINTAINERS.md

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+# The People
+
+To see what these roles do, and how to become one, look at [GOVERNANCE](./GOVERNANCED.md).
+
+## Triagers
+
+## Collaborators
+
+- Sean McArthur (@seanmonstar)
+- Steven Fackler (@sfackler)
+- Oliver Gould (@olix0r)
+- Eliza Weisman (@hawkw)
+- Lucio Franco (@LucioFranco)
+- Anthony Ramine (@nox)
+- David Pedersen (@davidpdrsn)
+- Adam Foltzer (@acfoltzer)
+
+<details>
+<summary>Emeriti</summary>
+
+### Collaborator emeriti
+
+- Jonathan Reem (@reem)
+- Carl Lerche (@carllerche)
+
+</details>
+
+## Maintainers
+
+- Sean McArthur (@seanmonstar)