Implement Http Client Logic

[f-galland]

Description

This PR adds Http client functionality to the command manager plugin, meant to query the Wazuh Server's command API.

Issues Resolved

Resolves #89

[f-galland]

I've attempted to migrate towards HttpClient but I've found that it depends on SLF4J which seems not to be compatible with org.apache.logging.log4j.Logger (which is the logging library we've been using so far).

We might have to move all the plugins to slf4j for consistency's sake.

[f-galland]

Actually, just adding slf4j to the build.gradle following the example in HttpClient's pom gets rid of the issue.

Now I get a new error (which seems more frequent in google results):

[2024-10-08T08:36:25,160][WARN ][stderr                   ] [integTest-0] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
[2024-10-08T08:36:25,160][WARN ][stderr                   ] [integTest-0] SLF4J: Defaulting to no-operation (NOP) logger implementation
[2024-10-08T08:36:25,161][WARN ][stderr                   ] [integTest-0] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.