Add support for agent self-restarting for Windows

[lchico]

Parent issue:

• Add support for agent self-restarting #54

Description

We need to develop a Minimum Viable Product (MVP) that enables the Wazuh agent to support a command for self-restart for Windows.

Functional requirements

• The agent should accept a command to initiate a restart.
• The agent should perform a clean restart, ensuring all processes are correctly shut down and restarted.
• Log the restart event, including the timestamp and initiating command details.

Non-functional requirements

• The restart process should not exceed a predefined time limit (e.g., 30 seconds) to minimize downtime.

Implementation restrictions

• Start from the Spike issue: Agent command manager #4
• Ensure that the implementation is thoroughly tested with unit tests and integration tests.

Plan

• Add support for Windows agent self-restarting: Development Phase
  • Implement the command to initiate a restart.
  • Add logging for restart events.
• Add support for Windows agent self-restarting: Testing Phase
  • Develop and execute unit tests for the new functionality.
  • Perform integration tests to ensure the command works across different environments.

[aritosteles]

Update

• 21-02-2025:
  Setting up the environment. Getting up to date with the status of the Agent in Windows OS.
• 24-02-2025:
  Trying to devise a strategy for the implementation of the Restart command.
  Ran into an issue with the configuration_parser which is not working with the default configuration file (and so the Windows agent won´t run as a service). There is an extra "/" at the beginning of the default path.

Implementation of the Restart command in Windows doesn´t seem as straightforward as in other platforms. Windows SCM does not have a restart command and so the service can´t restart itself so easily. Looking for a solution.

• 25-02-2025:
  Implemented restart command support for both the agent running in foreground and as a service. In the case of the service we opted for a Powershell command to restart the service. In the case of the agent running in foreground used a call to cmd with a delay to allow the running agent to close. Output is lost after restart same as what happens in linux. Will put PR ready for review.
• 26-02-2025:
  Did some refactoring. Addressed issues that came up in the review. Changes merged.