add support for leading ../ in patterns

[SuperchupuDev]

Current Status

unsure if it's needed, will only merge if i see actual usecases in the wild that break without this.

if you need this, please let me know!

---

kinda hacky, but i can't think of anything else. has a notable performance hit if patterns start with ../ unless ignore options are better configured by the user

imagine you do the following:

glob(['../b/*.ts', '*.ts'], {
  cwd: 'users/me/projects/a'
});

// ['../b/a.ts', 'a.ts']

where the projects directory contains a/a.ts and b/a.ts, in addition to a node_modules folder bigger than god knows what.

in this case, tinyglobby infers a common root of users/me/projects, and it will start crawling every file under that root. this includes everything inside node_modules.

as such, it does some extra crawling that can make the whole thing potentially very slow. one solution for this would be for the user to manually ignore everything they don't want:

glob(['../b/*.ts', '*.ts'], {
  cwd: 'users/me/projects/a',
  ignore: ['../node_modules/**']
});

// ['../b/a.ts', 'a.ts']

this makes it fast again. thoughts?

[SuperchupuDev]

someone's usecase is indeed breaking without this

unocss/unocss#4094 (comment)