fix: reduce TODO.md merge conflicts during rebases with gitattributes

.gitattributes

@@ -0,0 +1,5 @@
+# Reduce merge conflicts for auto-generated TODO.md file
+# The 'union' merge strategy combines lines from both versions without creating conflicts
+# Since TODO.md is regenerated by the pre-commit hook after each commit,
+# this prevents unnecessary merge conflicts during rebases
+TODO.md merge=union

README.md

@@ -263,11 +263,23 @@ Prebuilt wheels are published for:
 
 ## 🛠 Troubleshooting
 
+### Build Issues
+
 - If no wheel is available for your platform, `pip` will try to build from source — which **requires a Rust toolchain**.
 - If you encounter build errors, please:
   1. Check the [latest releases](https://github.com/simone-viozzi/rusty-todo-md/releases) to confirm wheel availability.
   2. Open an [issue](https://github.com/simone-viozzi/rusty-todo-md/issues) with your OS/arch details.
 
+### Reducing Merge Conflicts
+
+When rebasing branches, the `TODO.md` file can create merge conflicts for each commit because line numbers change as code moves. To minimize these conflicts, add a `.gitattributes` file to your repository with the following content:
+
+```gitattributes
+TODO.md merge=union
+```
+
+This tells Git to use the "union" merge strategy for `TODO.md`, which combines lines from both versions instead of creating conflicts. Since `TODO.md` is regenerated by the pre-commit hook after each commit, this approach safely prevents unnecessary merge conflicts during rebases.
+
 ---
 
 ## 👩‍💻 Development