devtools: Add fix-style-errors script by @sangbida.

A helper tool to fix code style errors using `ruff` and `clang-format`
and correct spelling.

devtools/fix-style-errors

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Takes a list of files and applies style fixes for Python using `ruff` and C using
+# `clang-format`. Also corrects spelling using `codespell`. This tool is an auxiliary to the
+# `pre-commit` hooks found in:
+#   `.pre-commit-config.yaml`
+#
+# WARNING: Changes are destructive. Ensure a clean working environment before running.
+#
+# By: @sangbida
+
+for file in "$@"; do
+    case "$file" in
+        *.py)  ruff check --fix "$file"; ruff format "$file" ;;
+        *.c|*.h)  clang-format -i "$file" 2>/dev/null ;;
+    esac
+    codespell -w "$file" 2>/dev/null
+done