config: prepare package for release

[codeboten]

This PR does the following:

• adds a section to versions.yaml, please review that the new section makes sense, it didn't seem to fit in any of the other groups.
• adds doc.go

Fixes #4415

[codecov]

Codecov Report

Merging #4541 (df698a8) into main (016b46f) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is 0.0%.

@@          Coverage Diff          @@
##            main   #4541   +/-   ##
=====================================
  Coverage   80.8%   80.8%           
=====================================
  Files        150     150           
  Lines      10371   10371           
=====================================
  Hits        8387    8387           
  Misses      1840    1840           
  Partials     144     144           

Files	Coverage Δ
config/config.go	100.0% <ø> (ø)
instrumentation/host/host.go	0.0% <0.0%> (ø)

[codeboten]

@pellared does this type of change require a changelog? Happy to add one, I just wasn't sure :)

[pellared]

1. Can we remove README.md so that its content is not displayed in pkgsite (pkg.go.dev)?
2. Can we document (even as a TODO comment refering to config: Create SDK from model #4371) that NewSDK is not really implemented?

[pellared]

@pellared does this type of change require a changelog? Happy to add one, I just wasn't sure :)

I added a "Skip Changelog" label.

[codeboten]

1. Can we remove README.md so that its content is not displayed in pkgsite (pkg.go.dev)?

   2. Can we document (even as a TODO comment refering to config: Create SDK from model #4371) that NewSDK is not really implemented?

The readme has been removed, and todo's added in config.go. PTAL

[pellared]

todo's added in config.go.

PS. I was thinking about adding TODO to NewSDK doc comment. I need to be more clear in future. But we can leave it as it is 😄