Refactor VS Code extension infrastructure and features

[Shenglong Li (shenglol)]

Summary

Begin the feature-oriented reorganization of vscode-bicep, following the ownership model introduced in Bicep.LangServer.

• document the complete three-PR migration plan
• establish features/ and infrastructure/ domains with narrow barrel APIs
• move low-risk features including build, parameters, configuration, module restore, resource import, refactoring, surveys, and walkthroughs
• consolidate command registration, lifecycle, configuration, editor, logging, output channel, and timing infrastructure
• co-locate migrated unit tests and enable co-located Jest discovery
• normalize touched TypeScript and test filenames to kebab-case
• add feature activation functions and simplify extension composition
• exclude engineering docs from the VSIX

The migration document records the remaining language workflow, deployment, visualization, E2E relocation, and package-root work for follow-up PRs.

Validation

• npx tsc --noEmit
• npx tsc -p tsconfig.e2e.json --noEmit
• npm run lint
• npm run test:unit -- --runInBand (38/38 passed)
• production webpack bundle completed successfully
• E2E: 38/40 passed; all migrated feature suites passed. The two remaining failures are in the unchanged hover suite: one packaged-language-server documentation URL mismatch and one timeout after the extension host became temporarily unresponsive.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 31466764493)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 31466764493

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 31466764493"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 31466764493

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 31466764493"