Rediff patches

Add 0002-Use-pre-Rust-1.81-compatible-file-exists-test.patch: <REASON>
Add 0001-Rust-edition-downgrade-to-2021.patch: <REASON>

debian/patches/0001-Rust-edition-downgrade-to-2021.patch

@@ -0,0 +1,23 @@
+From: Robert Garrett <robertgarrett404@gmail.com>
+Date: Sun, 1 Jun 2025 17:59:20 -0500
+Subject: Rust edition downgrade to 2021
+
+Debian Bookworm uses Rust 1.64 which only supports up to the 2021
+edition.
+---
+ Cargo.toml | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Cargo.toml b/Cargo.toml
+index febccc4..cf52754 100644
+--- a/Cargo.toml
++++ b/Cargo.toml
+@@ -1,7 +1,7 @@
+ [package]
+ name = "gt-tool"
+ version = "1.0.0"
+-edition = "2024"
++edition = "2021"
+ 
+ [dependencies]
+ clap = { version = "4.0.7", features = ["derive", "env"] }