Create client for Tools API (#1348)

This commit creates a class for the new Tools API. It extracts common
methods from crewai.cli.deploy.api.CrewAPI to a parent class.

src/crewai/cli/plus_api.py

@@ -0,0 +1,23 @@
+import requests
+from os import getenv
+from crewai.cli.deploy.utils import get_crewai_version
+
+
+class PlusAPI:
+    """
+    This class exposes methods for working with the CrewAI+ API.
+    """
+
+    def __init__(self, api_key: str) -> None:
+        self.api_key = api_key
+        self.headers = {
+            "Authorization": f"Bearer {api_key}",
+            "Content-Type": "application/json",
+            "User-Agent": f"CrewAI-CLI/{get_crewai_version()}",
+            "X-Crewai-Version": get_crewai_version(),
+        }
+        self.base_url = getenv("CREWAI_BASE_URL", "https://app.crewai.com")
+
+    def _make_request(self, method: str, endpoint: str, **kwargs) -> requests.Response:
+        url = f"{self.base_url}/{endpoint}"
+        return requests.request(method, url, headers=self.headers, **kwargs)