Add a link to project governance and MAINTAINERS file

The MAINTAINERS file is based on the current OWNERS file. I added
our core maintainers as they are expected to have commit bits on
all project repositories.

The existing MAINTAINERS file, which appears out of date, was
removed in favor of the new one (which has all CNCF mandated
information).

Signed-off-by: Matt Heon <mheon@redhat.com>

GOVERNANCE.md

@@ -0,0 +1,3 @@
+## The Buildah Project Community Governance
+
+The Buildah project, as part of Podman Container Tools, follows the [Podman Project Governance](https://github.com/containers/podman/blob/main/GOVERNANCE.md).

MAINTAINERS

@@ -1,4 +0,0 @@
-Dan Walsh <dwalsh@redhat.com> (@rhatdan)
-Nalin Dahyabhai <nalin@redhat.com> (@nalind)
-Tom Sweeney <tsweeney@redhat.com> (@tomsweeneyredhat)
-Urvashi Mohnani <umohnani@redhat.com> (@umohnani8)

MAINTAINERS.md

@@ -0,0 +1,31 @@
+# Buildah Maintainers
+
+[GOVERNANCE.md](https://github.com/containers/podman/blob/main/GOVERNANCE.md)
+describes the project's governance and the Project Roles used below.
+
+## Maintainers
+
+| Maintainer        | GitHub ID                                                | Project Roles                    | Affiliation                                  |
+|-------------------|----------------------------------------------------------|----------------------------------|----------------------------------------------|
+| Brent Baude       | [baude](https://github.com/baude)                        | Core Maintainer                  | [Red Hat](https://github.com/RedHatOfficial) |
+| Nalin Dahyabhai   | [nalind](https://github.com/nalind)                      | Core Maintainer                  | [Red Hat](https://github.com/RedHatOfficial) |
+| Matthew Heon      | [mheon](https://github.com/mheon)                        | Core Maintainer                  | [Red Hat](https://github.com/RedHatOfficial) |
+| Paul Holzinger    | [Luap99](https://github.com/Luap99)                      | Core Maintainer                  | [Red Hat](https://github.com/RedHatOfficial) |
+| Giuseppe Scrivano | [giuseppe](https://github.com/giuseppe)                  | Core Maintainer                  | [Red Hat](https://github.com/RedHatOfficial) |
+| Miloslav Trmač    | [mtrmac](https://github.com/mtrmac)                      | Core Maintainer                  | [Red Hat](https://github.com/RedHatOfficial) |
+| Neil Smith        | [Neil-Smith](https://github.com/Neil-Smith)              | Community Manager                | [Red Hat](https://github.com/RedHatOfficial) |
+| Tom Sweeney       | [TomSweeneyRedHat](https://github.com/TomSweeneyRedHat/) | Maintainer and Community Manager | [Red Hat](https://github.com/RedHatOfficial) |
+| Lokesh Mandvekar  | [lsm5](https://github.com/lsm5)                          | Maintainer                       | [Red Hat](https://github.com/RedHatOfficial) |
+| Dan Walsh         | [rhatdan](https://github.com/rhatdan)                    | Maintainer                       | [Red Hat](https://github.com/RedHatOfficial) |
+| Ashley Cui        | [ashley-cui](https://github.com/ashley-cui)              | Reviewer                         | [Red Hat](https://github.com/RedHatOfficial) |
+| Aditya Rajan      | [flouthoc](https://github.com/flouthoc)                  | Reviewer                         | [Red Hat](https://github.com/RedHatOfficial) |
+| Jan Rodák         | [Honny1](https://github.com/Honny1)                      | Reviewer                         | [Red Hat](https://github.com/RedHatOfficial) |
+| Valentin Rothberg | [vrothberg](https://github.com/vrothberg)                | Reviewer                         | [Red Hat](https://github.com/RedHatOfficial) |
+
+## Alumni
+
+None at present
+
+## Credits
+
+The structure of this document was based off of the equivalent one in the [CRI-O Project](https://github.com/cri-o/cri-o/blob/main/MAINTAINERS.md).

OWNERS

@@ -1,15 +1,24 @@
 approvers:
-  - TomSweeneyRedHat
+  - baude
+  - giuseppe
   - lsm5
+  - Luap99
+  - mheon
+  - mtrmac
   - nalind
   - rhatdan
-  - umohnani8
+  - TomSweeneyRedHat
 reviewers:
   - ashley-cui
   - baude
-  - edsantiago
   - flouthoc
   - giuseppe
   - Honny1
+  - lsm5
+  - Luap99
   - mheon
+  - mtrmac
+  - nalind
+  - rhatdan
+  - TomSweeneyRedHat
   - vrothberg