feat!: rework WoT discover method

[JKRhb]

This PR will add a reworked version of the discover method to the project.

My plan is to be able to provide a global configuration for the method via the Servient class that could maybe even be overridden via a method parameter. However, in order to stay consistent with the specification, it might be better to allow configuration only by using the “underlying implementation”. I will experiment a bit in this PR with the different approaches before marking it as ready for review/discussion.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 1.14943% with 86 lines in your changes are missing coverage. Please review.

Project coverage is 66.80%. Comparing base (1a864a4) to head (36145b4).

Files	Patch %	Lines
lib/src/core/implementation/thing_discovery.dart	0.00%	76 Missing ⚠️
...lementation/discovery/discovery_configuration.dart	0.00%	9 Missing ⚠️
lib/src/core/implementation/wot.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #133      +/-   ##
==========================================
+ Coverage   66.54%   66.80%   +0.25%     
==========================================
  Files          75       76       +1     
  Lines        2442     2434       -8     
==========================================
+ Hits         1625     1626       +1     
+ Misses        817      808       -9     

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[JKRhb]

I think this PR is now ready to be merged :) As indicated in the PR description, the discover method now uses the configuration of the Servient to perform discovery. The configuration is mutable can be adjusted at runtime, so that repeated calls with different configurations could be made.

It might make sense to also be able to override the configuration as a parameter in the discover method itself, but this might also require some more discussion in the Scripting API taskforce to determine if there could be a “well-known” set of discovery procedures that could be standardized. In any case, I think this PR can already serve as useful input for w3c/wot-scripting-api#535 and w3c/wot-scripting-api#551.

Following the merge of this PR, I will soon prepare a new minor release.