fix: remove basedir in resolveOptions, allow original NodeJS resolve algorithm

[amoshydra]

What:

Fix #233. Allow NodeJS original node_module algorithm to be used by @esbuild-plugins/node-resolve / resolve.

Why:

68 specified basedir to cwd which causes all node_modules resolution to start at cwd. This prevent nested node_modules to ever be resolved. See #233

Below illustrate the incorrect search paths when basedir is mapped to cwd

cwd:
- "/project"

import:
- "package-a"

caller:
- "/project/node_modules/package-c"

search_paths:
- "/project/node_modules/package-a"
- "/node_modules/package-a"

How:

By removing resolveOptions.basedir, it allow @esbuild-plugins/node-resolve / resolve to use the default NodeJS node_modules resolve algorithm where node_modules resolution starts from the directory of the caller module.

Below illustrate the correct search paths

cwd:
- "/project"

import:
- "package-a"

caller:
- "/project/node_modules/package-c"

search_paths:
- "/project/node_modules/package-c/node_modules/package-a"
- "/project/node_modules/package-a"
- "/node_modules/package-a"

Checklist:

• [ ] Documentation - N/A
• [ ] Tests - Not sure
  • need more robust testing fixture - existing test from #68 doesn't seems to cover this case
  • reverting the fix in #68 does not fail the test added to #68
  • need advice
• [x] Ready to be merged