ignore/types: add devicetree filetype

See: https://www.devicetree.org/

PR #2349

crates/ignore/src/default_types.rs

@@ -56,6 +56,7 @@ pub const DEFAULT_TYPES: &[(&str, &[&str])] = &[
     ("cython", &["*.pyx", "*.pxi", "*.pxd"]),
     ("d", &["*.d"]),
     ("dart", &["*.dart"]),
+    ("devicetree", &["*.dts", "*.dtsi"]),
     ("dhall", &["*.dhall"]),
     ("diff", &["*.patch", "*.diff"]),
     ("docker", &["*Dockerfile*"]),