adding initial CLI support

src/crewai/cli/templates/tools/custom_tool.py

@@ -0,0 +1,13 @@
+# For this make sure to install the tools package
+# pip install 'crewai[tools]'
+
+from crewai_tools import BaseTool
+
+
+class MyCustomTool(BaseTool):
+    name: str = "Name of my tool"
+    description: str = "Clear description for what this tool is useful for, you agent will need this information to use it."
+
+    def _run(self, argument: str) -> str:
+        # Implementation goes here
+        return "this is an example of a tool output, ignore it and move along."