Add API client and CDN manager implementation

- Introduced `ApiClient` class for handling API interactions, including authentication and resource management.
- Added `CDNManager` class for managing file uploads and downloads to/from a CDN.
- Implemented security features for encryption and decryption of sensitive data.
- Created supporting classes for credentials, user roles, and hardware information retrieval.
- Established constants for configuration and logging.

This commit lays the foundation for resource management and secure communication with the API and CDN services.

src/constants.pyx

@@ -0,0 +1,37 @@
+import os
+import sys
+from loguru import logger
+
+cdef str CDN_CONFIG = "cdn.yaml"
+cdef int SMALL_SIZE_KB = 3
+
+_log_dir = os.environ.get("LOG_DIR", "Logs")
+logger.remove()
+log_format = "[{time:HH:mm:ss} {level}] {message}"
+logger.add(
+    sink=f"{_log_dir}/log_loader_{{time:YYYYMMDD}}.txt",
+    level="INFO",
+    format=log_format,
+    enqueue=True,
+    rotation="1 day",
+    retention="30 days",
+)
+logger.add(
+    sys.stdout,
+    level="DEBUG",
+    format=log_format,
+    filter=lambda record: record["level"].name in ("INFO", "DEBUG", "SUCCESS"),
+    colorize=True
+)
+logger.add(
+    sys.stderr,
+    level="WARNING",
+    format=log_format,
+    colorize=True
+)
+
+cdef log(str log_message):
+    logger.info(log_message)
+
+cdef logerror(str error):
+    logger.error(error)