Enhance memory management and data structures

Updated `CollectionBenchmark` for setup/cleanup methods,
streamlined benchmarking in `Program.cs`, and improved
documentation in `AllocationOption` and `Allocator` enums.
Made `Enumerator` structs public in several collections
and clarified constructor parameters. Introduced a new
`UnsafeStack` struct for stack operations. Enhanced
`AllocationManager` with better memory tracking and
management, ensuring proper allocation and disposal.

Misaki.HighPerformance.Unsafe/Collections/AllocationOption.cs

@@ -2,14 +2,32 @@
 
 public enum AllocationOption : byte
 {
+    /// <summary>
+    /// Allocator for uninitialized memory
+    /// </summary>
     UnInitialized,
-    Clear
+    /// <summary>
+    /// Allocator for initialized memory.
+    /// </summary>
+    Clear,
+    /// <summary>
+    /// Allocator for untracked memory.
+    /// Use this option carefully, as the allocation manager will not track the memory.
+    /// No warning will be given if the memory is not freed.
+    /// </summary>
+    UnTracked
 }
 
-public enum Allocator: byte
+public enum Allocator : byte
 {
     // Make the first allocator as invalid because we don't want to user create a defualt collection without passing any parameters
-    Invalid = 0,
-    Temp = 1,
-    Persistent = 2,
+    Invalid,
+    /// <summary>
+    /// Allocator for temporary allocations. Allocations are cleared after use.
+    /// </summary>
+    Temp,
+    /// <summary>
+    /// Allocator for persistent allocations. Allocations are not cleared after use.
+    /// </summary>
+    Persistent,
 }