Add existing Azure icons to the new Graph rendering engine

[shenglol]

I'd like to use AI to replace the current cytoscape.js based visualizer app with the React based one in vscode-bicep-ui. Since the migration is complex, I used AI to create a migration plan with detailed docs for each step. The PR checks in the migration plan docs and complete step 1, which is to add Azure icons to the new app.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 21851316412)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 21851316412

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 21851316412"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 21851316412

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 21851316412"