feat: add gitpkg sdk packaging

Signed-off-by: yuguorui <yuguorui@pku.edu.cn>

Author: yuguorui

script/gitpkg.ts

@@ -0,0 +1,26 @@
+#!/usr/bin/env bun
+
+const dir = new URL("..", import.meta.url).pathname
+process.chdir(dir)
+
+const pkg = await import("../package.json").then((m) => m.default)
+const next = JSON.parse(JSON.stringify(pkg))
+
+const items = Object.entries(next.exports)
+for (const item of items) {
+  const key = item[0]
+  const value = item[1]
+  const data =
+    typeof value === "object" && value !== null && "import" in value
+      ? (value as { import?: unknown }).import
+      : undefined
+  const text = typeof value === "string" ? value : data
+  if (typeof text !== "string") continue
+  const file = text.replace("./src/", "./dist/").replace(".ts", "")
+  next.exports[key] = {
+    import: file + ".js",
+    types: file + ".d.ts",
+  }
+}
+
+await Bun.write("package.json", JSON.stringify(next, null, 2))