Expose Documentation section on IBicepConfiguration

[Likhitha Kodali (Likhithakmsft)]

Description

This PR adds a  IBicepDocumentationConfiguration  section interface (mirroring the other sections) and exposes Documentation  on  IBicepConfiguration , its concrete impl  BicepConfiguration , and  BicepConfigurationAdapter .
Purely additive, no behavior change.

Checklist

• I have read and adhere to the contribution guide.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 32517085954)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 32517085954

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 32517085954"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 32517085954

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 32517085954"