if you want to switch to .page syntax for next.js, this script renames all the files in the /pages folder recursively to append .page before the file extension

rename-next-pages-prefix.js

const fs = require('fs');
const path = require('path');

// Function to rename files in the given directory
const renameFiles = (dir) => {
  // Read the contents of the directory
  fs.readdir(dir, (err, files) => {
    if (err) {
      // If there is an error, log it and return
      console.error(err);
      return;
    }

    // Loop through the files in the directory
    files.forEach((file) => {
      // Get the full path of the file
      const filePath = path.join(dir, file);

      // Check if the file is a directory
      if (fs.statSync(filePath).isDirectory()) {
        // If it is a directory, recursively call the function to rename the files in that directory
        renameFiles(filePath);
      } else {
        // If it is a file, rename it by appending '.page' to the end of the file name (before the file extension)

        // Use a regular expression to match the file extension
        const extensionRegex = /\.[0-9a-z]+$/i;
        const fileExt = file.match(extensionRegex)[0];

        // Construct the new file name by appending '.page' to the end of the file name, before the file extension
        const newFileName = `${file.replace(extensionRegex, '')}.page${fileExt}`;

        fs.rename(filePath, path.join(dir, newFileName), (renameErr) => {
          if (renameErr) {
            // If there is an error, log it
            console.error(renameErr);
          }
        });
      }
    });
  });
};

// Call the function to rename the files in the './pages' directory
renameFiles('./pages');