Add version command to CLI (#348)

* feat: add version command to cli with tools flag

* test: check output of version and tools flag

* fix: add version tool info to cli outputs

tests/cli_test.py

@@ -0,0 +1,20 @@
+from click.testing import CliRunner
+from crewai.cli.cli import version
+
+
+def test_version_command():
+    runner = CliRunner()
+    result = runner.invoke(version)
+    assert result.exit_code == 0
+    assert "crewai version:" in result.output
+
+
+def test_version_command_with_tools():
+    runner = CliRunner()
+    result = runner.invoke(version, ["--tools"])
+    assert result.exit_code == 0
+    assert "crewai version:" in result.output
+    assert (
+        "crewai tools version:" in result.output
+        or "crewai tools not installed" in result.output
+    )