adds refactored copy of main

src/main_env.ts

@@ -0,0 +1,26 @@
+import * as core from '@actions/core';
+import fs from 'fs';
+import util from 'util';
+
+async function run(): Promise<void> {
+  try {
+    const filePath = core.getInput('path');
+    const encoding = core.getInput('encoding');
+    const readFile = util.promisify(fs.readFile);
+    const contents = await readFile(filePath, encoding);
+    core.info(`File contents:\n${contents}`);
+
+    // Write to environment file
+    const outputFilePath = process.env.GITHUB_ENV || '';
+    if (outputFilePath) {
+      const output = `contents<<EOF\n${contents}\nEOF`;
+      await fs.promises.appendFile(outputFilePath, output + '\n');
+    } else {
+      core.warning('GITHUB_ENV not defined. Cannot write to environment file.');
+    }
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+run();