refactor(registerCommands): tighten command map value type

Replace the residual `any` in the command-callback map value with a
`CommandCallback` alias of `(...args: any[]) => unknown`. Mirrors
VS Code's own `commands.registerCommand` signature while narrowing
the return to `unknown` so callers must inspect before use.

Rest-args stay `any[]` intentionally: the callbacks in this map are
heterogeneous (`importSettings` takes an optional `filePath?: string`,
the rest take none), and VS Code dispatches positional args
dynamically — a single tight per-arity type would be lossy without
splitting the map.

Author: 0xMink

src/activate/registerCommands.ts

@@ -77,11 +77,19 @@ export const registerCommands = (options: RegisterCommandOptions) => {
 // `registerRipgrepDiagnosticCommand` (above), which owns the OutputChannel
 // lifecycle alongside the command registration, so it's intentionally
 // excluded from this map.
+//
+// Callback shape mirrors VS Code's own `commands.registerCommand` signature
+// (`(...args: any[]) => any`), with the return narrowed to `unknown` so
+// callers must inspect before using. `any[]` for args is unavoidable: the
+// callbacks here are heterogeneous (`importSettings` takes an optional
+// `filePath?: string`, others take none) and VS Code dispatches positional
+// args dynamically.
+type CommandCallback = (...args: any[]) => unknown
 const getCommandsMap = ({
 	context,
 	outputChannel,
 	provider,
-}: RegisterCommandOptions): Record<Exclude<CommandId, "showRipgrepDiagnostic">, any> => ({
+}: RegisterCommandOptions): Record<Exclude<CommandId, "showRipgrepDiagnostic">, CommandCallback> => ({
 	activationCompleted: () => {},
 	plusButtonClicked: async () => {
 		const visibleProvider = getVisibleProviderOrLog(outputChannel)