chore: Add build-rs to the Cargo workspace

Author: epage

build-rs/.github/renovate.json5

@@ -0,0 +1,15 @@
+[package]
+name = "build-rs"
+version = "0.2.0"
+rust-version.workspace = true
+edition.workspace = true
+license.workspace = true
+homepage.workspace = true
+repository.workspace = true
+description = "API for writing Cargo `build.rs` files"
+
+[features]
+unstable = []
+
+[lints]
+workspace = true