feat(run): browse buttons on path fields and a resizable Run/Debug Configurations dialog (#1108)

Run configuration types mark path fields (browse: file or directory, or chosen from the other params) and the form puts a folder button next to them; Working directory and Redirect input get one too, storing project paths relative to the root. Covers Tomcat, Shell Script, Executable, Godot, npm, Gradle, Maven, Go, Ruby and Docker path fields. The dialog is resizable and its content grows with it.

src/workbench/contributions.ts

@@ -1118,6 +1118,8 @@ export interface RunConfigTypeField {
   validate?(value: string, params: Readonly<Record<string, string>>): string | null;
   /** Shown under the control. */
   hint?: string;
+  /** A text field holding a path: a button next to it picks a file or a directory (absolute path). */
+  browse?: "file" | "directory" | ((params: Readonly<Record<string, string>>) => "file" | "directory");
 }
 
 export interface RunConfigTypeContribution {