Initial implementation of command link arguments (#573)

Initial implementation of command link arguments

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Co-authored-by: prcrst <p-github@prcr.st>
Co-authored-by: Zef Hemel <zef@zef.me>

plug-api/silverbullet-syscall/system.ts

@@ -9,8 +9,8 @@ export function invokeFunction(
 }
 
 // Only available on the client
-export function invokeCommand(name: string): Promise<any> {
-  return syscall("system.invokeCommand", name);
+export function invokeCommand(name: string, args?: string[]): Promise<any> {
+  return syscall("system.invokeCommand", name, args);
 }
 
 // Only available on the client