Added create container grpc method

Signed-off-by: Ilyas Niyazov <i.niyazov@yadro.com>

frostfs_sdk/client/models/client_environment.py

@@ -0,0 +1,8 @@
+import grpc
+from frostfs_sdk.client.models.ecdsa import ECDSA
+
+
+class ClientEnvironment:
+    def __init__(self, ecdsa: ECDSA, channel: grpc.Channel):
+        self.ecdsa = ecdsa
+        self.channel = channel

frostfs_sdk/client/models/client_settings.py

@@ -0,0 +1,19 @@
+class ClientSettings:
+    def __init__(self, wif: str = None, address: str = None):
+        """
+        Initializes client settings with validation.
+
+        Args:
+            wif: Wallet import format string
+            address: FrostFS node host address
+        """
+        self.wif = wif
+        self.address = address
+
+        # Perform validation after initialization
+        self.validate()
+
+    def validate(self):
+        """Performs runtime validation of the settings"""
+        if not (self.address and self.wif):
+            raise ValueError("The value must be specified ADDRESS and WIF")

frostfs_sdk/client/models/ecdsa.py

@@ -0,0 +1,8 @@
+from frostfs_sdk.cryptography.key_extension import KeyExtension
+
+
+class ECDSA:
+    def __init__(self, wif: str):
+        self.wif = wif
+        self.private_key: bytes = KeyExtension().get_private_key_from_wif(wif)
+        self.public_key: bytes = KeyExtension().get_public_key(self.private_key)