026 interpreter run event

// Test: std/interpreter:run event
// Uses ~get-scope to get dispatcher, passes to std/interpreter:run

~import std/runtime
~import std/interpreter
~import std/io

~pub event greet { name: []const u8 }
| greeted []const u8

~proc greet|zig {
    const std = @import("std");
    std.debug.print("GREET: Hello, {s}!\n", .{name});
    return .{ .greeted = "Hello!" };
}

~std/runtime:register(scope: "test") {
    greet
}

const TEST_SOURCE = "~greet(name: \"World\")";

~std/runtime:get-scope(name: "test")
| scope s |> std/interpreter:run(source: TEST_SOURCE, s.dispatcher)
    | result _ |> std/io:print.ln("SUCCESS")
    | exhausted _ |> std/io:print.ln("EXHAUSTED")
    | parse-error _ |> std/io:print.ln("PARSE ERROR")
    | validation-error _ |> std/io:print.ln("VALIDATION ERROR")
    | dispatch-error _ |> std/io:print.ln("DISPATCH ERROR")
| not-found |> std/io:print.ln("SCOPE NOT FOUND")