working example with fixed flake

.gitignore

@@ -0,0 +1,49 @@
+# === Rust / Cargo ===
+/target/
+/**/target/
+/**/*.rlib
+**/*.d
+**/*.rlib
+**/*.rmeta
+
+# === Nix / Flakes ===
+result
+.nix-result
+.nix-gcRoots
+.direnv
+.envrc
+.nix-hidden
+
+# === Editor / IDE ===
+# VSCode
+.vscode/
+# IntelliJ / CLion / RustRover
+.idea/
+*.iml
+# Emacs
+*~
+.#*
+# Vim
+*.swp
+*.swo
+
+# === Logs and Dumps ===
+*.log
+*.out
+*.err
+
+# === OS Junk ===
+.DS_Store
+Thumbs.db
+
+# === ESP build junk ===
+esp-idf/
+.espressif/
+*.elf
+*.bin
+*.uf2
+*.app
+*.map
+
+
+flake.lock