refactor(cli): introduce the migration-runner helper for less code duplication and fewer return paths

Thanks to the migration-runner the "up" and "list" commands are now very similar code wise

packages/cli/src/to-migration-metadata.ts

@@ -0,0 +1,30 @@
+import path from 'node:path';
+import { type MigrationHistoryEntry, type MigrationMetadataFinished } from '@emigrate/plugin-tools/types';
+import { withLeadingPeriod } from './with-leading-period.js';
+import { MigrationHistoryError } from './errors.js';
+
+export const toMigrationMetadata = (
+  entry: MigrationHistoryEntry,
+  { cwd, directory }: { cwd: string; directory: string },
+): MigrationMetadataFinished => {
+  const filePath = path.resolve(cwd, directory, entry.name);
+  const finishedMigration: MigrationMetadataFinished = {
+    name: entry.name,
+    status: entry.status,
+    filePath,
+    relativeFilePath: path.relative(cwd, filePath),
+    extension: withLeadingPeriod(path.extname(entry.name)),
+    directory,
+    cwd,
+    duration: 0,
+  };
+
+  if (entry.status === 'failed') {
+    finishedMigration.error = new MigrationHistoryError(
+      `Migration ${entry.name} is in a failed state, it should be fixed and removed`,
+      entry,
+    );
+  }
+
+  return finishedMigration;
+};