Add Exploit Mitigations Project Group repository

Author: rcvalle

repos/rust-lang/project-exploit-mitigations.toml

@@ -0,0 +1,13 @@
+org = "rust-lang"
+name = "project-exploit-mitigations"
+description = "Exploit Mitigations Project Group"
+bots = []
+
+[access.teams]
+core = "admin"
+mods = "maintain"
+project-exploit-mitigations = "maintain"
+
+[[branch]]
+name = "main"
+dismiss-stale-review = true