Inject cjs and esm shims support `import.meta.dirname`

https://nodejs.org/docs/latest/api/esm.html#importmetadirname

`import.meta.filename` is the same as the `url.fileURLToPath()` of the `import.meta.url`.
`import.meta.dirname` is the same as the `path.dirname()` of the `import.meta.filename`.

[inject-cjs-and-esm-shims](https://tsup.egoist.dev/#inject-cjs-and-esm-shims) need support `import.meta.dirname` and `import.meta.filename`

Read the linked Node.js ESM documentation and the tsup “inject-cjs-and-esm-shims” documentation first. Trace the implementation of those shims, then verify that both import.meta.dirname and import.meta.filename are supported consistently for CommonJS and ESM output.

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