feat: add utility functions for environment variable handling, file operations, pointer manipulation, random generation, and string processing

utils/ptr/ptr.go

@@ -0,0 +1,16 @@
+package ptr
+
+// Of returns a pointer to v.
+func Of[T any](v T) *T { return &v }
+
+// Deref returns the value pointed to by p, or def if p is nil.
+func Deref[T any](p *T, def T) T {
+    if p == nil {
+        return def
+    }
+    return *p
+}
+
+// Zero returns the zero value for type T.
+func Zero[T any]() (z T) { return }
+