Add Snapshotter

Closes: #2

src/crawlee/_utils/math.py

@@ -25,3 +25,15 @@ def weighted_avg(values: list[float], weights: list[float]) -> float:
         raise ValueError('Total weight cannot be zero')
 
     return result / total_weight
+
+
+def to_mb(bytes_: int) -> int:
+    """Converts bytes to megabytes (MB).
+
+    Args:
+        bytes_: The number of bytes to convert.
+
+    Returns:
+        int: The equivalent size in megabytes.
+    """
+    return round(bytes_ / (1024**2))

src/crawlee/autoscaling/memory_info.py

@@ -0,0 +1,19 @@
+# Inspiration: https://github.com/apify/crawlee/blob/master/packages/utils/src/internals/memory-info.ts
+
+from dataclasses import dataclass
+
+
+@dataclass
+class MemoryInfo:
+    """Describes memory usage of the process."""
+
+    total_bytes: int  # Total memory available in the system or container
+    free_bytes: int  # Amount of free memory in the system or container
+    used_bytes: int  # Amount of memory used (= totalBytes - freeBytes)
+    main_process_bytes: int  # Amount of memory used by the current Python process
+    child_processes_bytes: int  # Amount of memory used by child processes of the current Python process
+
+
+async def get_memory_info() -> MemoryInfo:
+    # TODO
+    return MemoryInfo(1, 2, 3, 4, 5)