[VSCODE] Add inline actions (called CompletionItems in the API) for the manifest

[jgw96]

Tell us about your feature idea

inspired by: is it possible to add an inline command above the icons property that I can click to generate the icons (similar to how I can start debugging directly from package.json)?

This should handle:
icons,
screenshots
colors

Do you have an implementation or a solution in mind?

Use the CompletionItems API https://code.visualstudio.com/api/references/vscode-api to implement in a way that would be familiar to VSCode users

Have you considered any alternatives?

No response