tsdown + cli with commander (#17)

* feat: tsdown

* fix: formatting

* automate version updates in cli

* fix: docs

* scenarios

* fix: commander deps

src/runner/utils.ts

@@ -0,0 +1,62 @@
+import { promises as fs } from 'fs';
+import path from 'path';
+import { ConformanceCheck } from '../types';
+
+// ANSI color codes
+export const COLORS = {
+  RESET: '\x1b[0m',
+  GRAY: '\x1b[90m',
+  GREEN: '\x1b[32m',
+  YELLOW: '\x1b[33m',
+  RED: '\x1b[31m',
+  BLUE: '\x1b[36m'
+};
+
+export function getStatusColor(status: string): string {
+  switch (status) {
+    case 'SUCCESS':
+      return COLORS.GREEN;
+    case 'FAILURE':
+      return COLORS.RED;
+    case 'INFO':
+      return COLORS.BLUE;
+    default:
+      return COLORS.RESET;
+  }
+}
+
+export function formatPrettyChecks(checks: ConformanceCheck[]): string {
+  // Find the longest id and status for column alignment
+  const maxIdLength = Math.max(...checks.map((c) => c.id.length));
+  const maxStatusLength = Math.max(...checks.map((c) => c.status.length));
+
+  return checks
+    .map((check) => {
+      const timestamp = `${COLORS.GRAY}${check.timestamp}${COLORS.RESET}`;
+      const id = check.id.padEnd(maxIdLength);
+      const statusColor = getStatusColor(check.status);
+      const status = `${statusColor}${check.status.padEnd(maxStatusLength)}${COLORS.RESET}`;
+      const description = check.description;
+      const line = `${timestamp} [${id}] ${status} ${description}`;
+      // Add newline after outgoing responses for better visual separation
+      return (
+        line +
+        (check.id.includes('outgoing') && check.id.includes('response')
+          ? '\n'
+          : '')
+      );
+    })
+    .join('\n');
+}
+
+export async function ensureResultsDir(): Promise<string> {
+  const resultsDir = path.join(process.cwd(), 'results');
+  await fs.mkdir(resultsDir, { recursive: true });
+  return resultsDir;
+}
+
+export function createResultDir(scenario: string, prefix = ''): string {
+  const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
+  const dirName = prefix ? `${prefix}-${scenario}` : scenario;
+  return path.join('results', `${dirName}-${timestamp}`);
+}