Load configs and directories from the working directory

[hariso]

Description

Currently, Conduit looks for the configuration file location and the pipelines, connectors and processors directories in the same directory where the Conduit binary is running.

That's not always desirable, e.g. when Conduit is installed as a package. In that case, running conduit in a directory won't use the config file, pipelines, etc. from that directory, even though a user will likely expect that.

Hence, this PR changes Conduit's behavior to search for the config file and the directories in the working directory by default.

Quick checks

• I have followed the Code Guidelines.
• There is no other pull request for the same update/change.
• I have written unit tests.
• I have made sure that the PR is of reasonable size and can be easily reviewed.

[raulb]

I like this a lot. Thank you @hariso