fix: use fileURLToPath for mimicked __dirname

[risu729]

Fix the __dirname mimic to remove a leading slash in it by using fileURLToPath instead.

Closes #562.

Ref: https://humanwhocodes.com/snippets/2023/01/mimicking-dirname-filename-nodejs-esm/

I checked through the repo and replaced all __dirname.

[azu]

Thanks.

Huh? I wonder why Windows CI has been going through until now.

[azu]

• https://github.com/search?q=repo%3Asecretlint%2Fsecretlint%20%2Fnew%20URL.*%5C.pathname%2F&type=code

secretlint/packages/@secretlint/quick-start/src/index.ts

Line 5 in 6eadd51

const defaultSecretlintRc = new URL("../config/.secretlintrc.json", import.meta.url).pathname;

@secretlint/quick-start also need to be updated?

[risu729]

I missed that part, sorry. I fixed it, so it should work now.

[azu]

Thanks!