[client] feat: add contract config type asset (#4302)

[savacano28]

Proposed changes

• Add asset contract config type

Related issues

• Closes #4302 ch 0

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

Further comments

[antoinemzs]

@Megafredo not the new value, which you can use in your structured output, pending the upcoming, actual refactoring.

Changes incurred by this refactoring will only impact the shodan contracts with changing the "type" string.

There will be a backwards compatibilty layer which will allow us to defer this impact