SR-6277 "WIP" Mute non-JSON output from "dump-package" (#1599)

* SR-6277 "WIP" Mute non-json output from dump-package

Submitting PR for feedback on the solution, in advance of writing unit tests.

This PR mutes tool progress output by default.

It also introduces a new dump-package option: ` --include-tool-output` to override this default and show dependency resolution and fetch progress as before.

Diagnostics that contain an error are still printed to the console.

I am seeking feedback on this solution as I an new to this codebase and unfamiliar with it's broader structure, and expectations regarding tool putput handling.

* Revert "SR-6277 "WIP" Mute non-json output from dump-package"

This reverts commit c560fe1.

* Load manifest instead of loading package graph

Author: erwinmaza

Sources/Commands/SwiftPackageTool.swift

@@ -186,9 +186,10 @@ public class SwiftPackageTool: SwiftTool<PackageToolOptions> {
             describe(graph.rootPackages[0].underlyingPackage, in: options.describeMode, on: stdoutStream)
 
         case .dumpPackage:
-            let graph = try loadPackageGraph()
-            let manifest = graph.rootPackages[0].manifest
-            print(try manifest.jsonString())
+            let workspace = try getActiveWorkspace()
+            let root = try getWorkspaceRoot()
+            let manifests = workspace.loadRootManifests(packages: root.packages, diagnostics: diagnostics)
+            print(try manifests[0].jsonString())
 
         case .completionTool:
             switch options.completionToolMode {