chore: add configmgr basic tests

[leoparente]

This pull request introduces new test cases for the configmgr package, focusing on the gitConfigManager, localConfigManager, and the manager.New function. The changes primarily involve adding comprehensive unit tests to ensure the proper functioning of these components.

New Tests for configmgr Package:

• Tests for gitConfigManager:

  • Added a test case TestGitStart to validate the Start method of gitConfigManager. This test includes setting up a temporary Git repository, committing files, and verifying the start process without errors.

• Tests for localConfigManager:

  • Introduced a test case TestLocalConfigManager to ensure the localConfigManager behaves correctly under different scenarios, including starting with policies, no policies, and missing backend.

• Tests for manager.New Function:

  • Added a test case TestManagerNew to verify that the New function returns the correct manager implementation based on the configuration. This includes tests for LocalManager, GitManager, and defaulting to LocalManager when an unknown type is provided.

[github-actions]

Go test coverage

STATUS	ELAPSED	PACKAGE	COVER	PASS	FAIL	SKIP
🟢 PASS	1.02s	github.com/netboxlabs/orb-agent/agent	0.0%	1	0	0
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent/backend	0.0%	0	0	0
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent/backend/devicediscovery	0.0%	0	0	0
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent/backend/networkdiscovery	0.0%	0	0	0
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent/backend/otel	0.0%	0	0	0
🟢 PASS	0.00s	github.com/netboxlabs/orb-agent/agent/backend/pktvisor	0.0%	0	0	0
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent/backend/worker	0.0%	0	0	0
🟢 PASS	1.05s	github.com/netboxlabs/orb-agent/agent/configmgr	47.7%	9	0	0
🟢 PASS	1.02s	github.com/netboxlabs/orb-agent/agent/policies	100.0%	15	0	0
🟢 PASS	1.03s	github.com/netboxlabs/orb-agent/agent/policymgr	70.3%	10	0	0
🟢 PASS	2.48s	github.com/netboxlabs/orb-agent/agent/secretsmgr	51.8%	45	0	0
🟢 PASS	1.01s	github.com/netboxlabs/orb-agent/agent/version	100.0%	1	0	0

Total coverage: 26.8%

[jajeffries]

These look like a good starting point. I think we could later build on these to handle more edge cases. Eg. when the selector.yaml file is missing etc

[github-actions]

🎉 This PR is included in version 2.0.0 🎉

The release is available on GitHub release

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