repo: propose to add a repo for store macro wg webpage

This commit is proposing to have a wg webpage for the
macros team in order to have a way where to put
all the information about the wg.

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

Author: vincenzopalazzo

repos/rust-lang/wg-macros.toml

@@ -0,0 +1,10 @@
+org = "rust-lang"
+name = "wg-macros"
+description = "Home of the Rust Macros Working Gruop"
+bots = ["rustbot"]
+
+[access.teams]
+wg-macros = "maintain"
+
+[[branch-protections]]
+pattern = "main"