Migrate runtime and build Babel tooling to Babel 8

[Copilot]

This updates the server from Babel 7 to Babel 8 and aligns the runtime bootstrap with Babel 8’s module/export behavior. The scope is intentionally limited to Babel package upgrades and the entrypoint change required to preserve @babel/register startup.

• Dependency upgrade

  • Bump the Babel toolchain to v8 in package.json:
    • @babel/cli
    • @babel/core
    • @babel/preset-env
    • @babel/register

• Runtime bootstrap compatibility

  • Update the CommonJS entrypoint to use Babel 8’s default export from @babel/register
  • Configure the register hook to ignore node_modules explicitly, matching Babel 8 expectations

• Resulting entrypoint change

  require('@babel/register').default({
    ignore: [/node_modules/],
  });
  require('src');

[Copilot]

Pull request overview

This PR migrates the project’s Babel toolchain from Babel 7 to Babel 8 and updates the runtime bootstrap so the server can continue to transpile src/ at startup via @babel/register.

Changes:

• Bumped core Babel dependencies (@babel/core, @babel/cli, @babel/preset-env, @babel/register) to v8.
• Updated the CommonJS entrypoint to invoke @babel/register’s default export and explicitly ignore node_modules.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
package.json	Upgrades Babel dependencies to v8 versions.
index.js	Adjusts runtime Babel register bootstrap to match Babel 8 export behavior and adds an explicit ignore for node_modules.

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