Grill Me STE: M2 - Rewrite the authored strings

Rewrite every authored string in extensions/grillme/index.ts to the STE rule categories: the registered tool metadata (description, promptSnippet, promptGuidelines, parameter descriptions), the command output, and the read-only block reasons. Tool names, parameter names, enums, and command syntax stay byte-identical.

Part of the "Grill Me STE style" enhancement.

No due date
100% Completed