chore(deps)!: update estree-walker to v3

[pi0]

Breaking change: unctx/plugin only works with ESM imports after this change since estree-walker is also esm-only.

[pi0]

Vitest is failing with this error:

Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No "exports" main defined in /Users/pooya/Code/unctx/node_modules/estree-walker/package.json
    at new NodeError (node:internal/errors:372:5)
    at throwExportsNotFound (node:internal/modules/esm/resolve:472:9)
    at packageExportsResolve (node:internal/modules/esm/resolve:693:7)
    at resolveExports (node:internal/modules/cjs/loader:482:36)
    at Function.Module._findPath (node:internal/modules/cjs/loader:522:31)
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:919:27)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (/Users/pooya/Code/unctx/vitest.config.ts:37:28) {
  code: 'ERR_PACKAGE_PATH_NOT_EXPORTED'
}

[pi0]

Used an ugly workaround to use esmResolve and jiti loading code.

[codecov]

Codecov Report

Merging #23 (7dec3eb) into main (61d2007) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #23   +/-   ##
=======================================
  Coverage   77.70%   77.70%           
=======================================
  Files           2        2           
  Lines         314      314           
  Branches       56       56           
=======================================
  Hits          244      244           
  Misses         14       14           
  Partials       56       56           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.