chore: update to nx 18.2

[NachoVazquez]

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: CONTRIBUTING.md#commit
• [ ] Tests for the changes have been added (for bug fixes / features)
• [x] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

Fixes: #36

What is the new behavior?

• The project is updated to the latest versions of all core packages including Nx
• The process.env.PWD is manually changed to match the fork cwd

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[cloudflare-workers-and-pages[bot]]

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