Add RFC for creating Arm team

Author: adamgreig

rfcs/0818-arm-team.md

@@ -0,0 +1,45 @@
+- Feature Name: arm-team
+- Start Date: 2025-02-11
+- RFC PR: https://github.com/rust-embedded/wg/pulls/818
+
+# Summary
+[summary]: #summary
+
+Merge the Cortex-A, Cortex-R and Cortex-M teams into a new Arm team, taking
+over the previous repositories and team members.
+
+# Motivation
+[motivation]: #motivation
+
+* Allow sharing maintenance of all the Arm crates including the Cortex-R crates
+  which currently have no maintainers
+* Better allow sharing of things that are common to all Arm architectures
+* Reduce large number of wg teams
+
+# Detailed design
+[design]: #detailed-design
+
+1. Create new Arm team
+2. Add all Cortex-A, Cortex-R, and Cortex-M members to Arm team
+3. Add all Cortex-A, Cortex-R, and Cortex-M repositories to Arm team
+4. Delete Cortex-A, Cortex-R, and Cortex-M teams
+
+# How We Teach This
+[how-we-teach-this]: #how-we-teach-this
+
+Update the WG README.
+
+# Drawbacks
+[drawbacks]: #drawbacks
+
+* Some existing team members may not have any interest or experience in other Arm platforms
+
+# Alternatives
+[alternatives]: #alternatives
+
+* Keep existing Cortex teams
+
+# Unresolved questions
+[unresolved]: #unresolved-questions
+
+N/A