externalize agent parameters + router

[cnuss]

Title:
Allow External Usage of agentParameters and mux.Router

Description:
To allow for another server framework than golang's http, we need to externalize the creation of mux.NewRouter().

Summary:
Related: #3224

When @borancar and I first authored #3224, we copied and pasted start.go and named it aires.go to gain access to mux.NewRouter(), so we could plug it into another server framework, as Lambda does not use golang's http package, however it is compatible with gorillamux.

So this PR allows us to import startcmd and leverage a couple new functions:

• NewAgentParameters()
  • AgentParameters is now an exported type
  • AgentParameters has a new method: NewRouter()
• nil-safety on helper functions for cobra.Command
  • Our lambda integration will use environment variables exclusively, so we pass nil when constructing AgentParameters

[cnuss]

FYI @troyronda @rolsonquadras @borancar this is released to #3224 to remove the copied/pasted aries.go we added

[cnuss]

@rolsonquadras I fixed some linting issues can you allow the workflows to run?

[cnuss]

@rolsonquadras sorry for the back and fourth, i enabled GH Actions on my Fork to get all the other Unit Test/Linting issues resolved.

We should be good to go now if you can run workflows once again!

[rolsonquadras]

@rolsonquadras sorry for the back and fourth, i enabled GH Actions on my Fork to get all the other Unit Test/Linting issues resolved.

We should be good to go now if you can run workflows once again!

@cnuss - tagging @sudeshrshetty @fqutishat @troyronda as they have access to run the workflows

[codecov]

Codecov Report

Merging #3229 (f8399f3) into main (2435073) will increase coverage by 0.00%.
The diff coverage is 65.92%.

@@           Coverage Diff           @@
##             main    #3229   +/-   ##
=======================================
  Coverage   88.72%   88.72%           
=======================================
  Files         309      309           
  Lines       41704    41716   +12     
=======================================
+ Hits        37002    37014   +12     
  Misses       3424     3424           
  Partials     1278     1278           

Impacted Files	Coverage Δ
cmd/aries-agent-rest/startcmd/start.go	79.25% <65.92%> (+0.47%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2435073...f8399f3. Read the comment docs.

[troyronda]

@cnuss It looks like the branch is out-of-date with the base branch.

[cnuss]

@troyronda thank you, i just sync'd with main!

could you trigger GH Actions again?

also added a unit test to get hopefully get codecov in order 🙏

cc: @sudeshrshetty @fqutishat

[cnuss]

@troyronda @sudeshrshetty @fqutishat these linting issues, first time collaborator pauses, and codecov breakages are really frustrating, and the only way i can figure out i've done something wrong is by committing then waiting

could one of you you attempt to push this PR over the finish line? i'm now having an unrelated unit test failure, probably because i'm using os.Setenv (appartently i can't use t.Setenv because we're on an older version of go?)

i've given each of you maintainer access to https://github.com/scaffoldly/aries-framework-go

[troyronda]

@cnuss This PR has been merged. Thanks for your contribution!