Categorize PSES Pipeline Tasks

[JustinGrote]

Prerequisites

• I have written a descriptive issue title.
• I have searched all issues to ensure it has not already been reported.

Summary

At PSConfEU it was discussed that it might be helpful if we can categorize certain tasks when they run thru the PSES pipeline, so we can surface this in the "spinning" message in the lower right. For instance, inform the user why it is blocked such as:

• Script Analysis
• Formatting (subset of script analysis)
• Actively Running Script in the PowerShell Extension Terminal

Proposed Design

Add a property to the task submission pipeline so that tasks can be categorized either by a strict enum list or arbitrary text, and surface the running task description via the LSP to the editor.

[MartinGC94]

Might be worth keeping this in mind when implementing this: #5021

[JustinGrote]

@MartinGC94 I forgot we already covered this! I'll close it as a dupe.