Add .gitignore for Go distributed systems exercise

.gitignore

@@ -0,0 +1,44 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Go workspace file
+go.work
+go.work.sum
+
+# Dependency directories (vendor is typically committed, but can be ignored if using modules)
+# vendor/
+
+# Build artifacts
+bin/
+build/
+dist/
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# OS generated files
+Thumbs.db
+ehthumbs.db
+
+# Temporary files
+tmp/
+temp/
+
+# Debug files
+debug
+__debug_bin*