[generic-connectors] Added generic connectors for IOC retrieval from simple line-based feeds

[PaulBerra]

Proposed changes

Related issues

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality using different use cases
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[PaulBerra]

Removed assigned but unused var causing linter errors

[romain-filigran]

Hello @PaulBerra and thank you for your contribution!

This connector suggestion appears to be very similar in functionality to our existing CSV Feed feature on the platform.
You can find the relevant documentation here: CSV Feed

Could you clarify the key differences between your connector proposal and this existing functionality?

[PaulBerra]

Hello, the functionalities are very similar.
Your current CSV feed system is a HELL to manage and configure with mappers.
So I've made 4 connectors with a current use that are very simple and quick to set up for teams that don't necessarily have the time or resources to learn how to use opencti in detail, especially for such simple cases of data formatting.

The advantage of these connectors is that you simply have to name them in the Dockerfile, fill in the environment variable url and simply do a “docker-compose up” to get the connector.

I haven't invented any opencti functionality, I've simply created a more 'optimized' solution to a specific problem I've encountered (and that others will surely encounter) and I've proposed it as a commit for those who might find themselves in the same situation as me.

feel free to discard the pull request if you think it doesn't add any value