refactor(release): extract dotenv/snapshot/workflow shared lib

scripts/release/lib/dotenv.mjs

@@ -0,0 +1,18 @@
+import { existsSync } from "node:fs";
+import { readFile } from "node:fs/promises";
+
+export async function loadEnvFile(filePath) {
+  if (!existsSync(filePath)) return;
+  const content = await readFile(filePath, "utf8");
+  for (const rawLine of content.split(/\r?\n/)) {
+    const line = rawLine.trim();
+    if (!line || line.startsWith("#")) continue;
+    const separatorIndex = line.indexOf("=");
+    if (separatorIndex <= 0) continue;
+    const key = line.slice(0, separatorIndex).trim();
+    if (!key || process.env[key]) continue;
+    const rawValue = line.slice(separatorIndex + 1).trim();
+    if (!rawValue) continue;
+    process.env[key] = rawValue.replace(/^['"]|['"]$/g, "");
+  }
+}