fix(js): add default baseUrl when extracting tsconfig.base.json or building libs will fail

[jaysoo]

This PR ensures that "rootDir": "." is set in tsconfig.base.json is set, or else generating libs in a standalone project will fail with and error like this:

error TS5090: Non-relative paths are not allowed when 'baseUrl' is not set. Did you forget a leading './'?

Current Behavior

Expected Behavior

Related Issue(s)

Fixes #

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1 Ignored Deployment

Name	Status	Preview	Updated (UTC)
nx-dev	⬜️ Ignored (Inspect)	Visit Preview	Jun 6, 2024 7:03pm

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✅ Successfully ran 6 targets

• nx affected --targets=e2e,e2e-ci --base=94b1a210abd4ae777af4c976053d951e4edd5a51 --head=08681c55fc88f311601ea3e2de2bda979bc9d5be --parallel=1
• nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• nx affected --targets=lint,test,build --base=94b1a210abd4ae777af4c976053d951e4edd5a51 --head=08681c55fc88f311601ea3e2de2bda979bc9d5be --parallel=3
• nx-cloud record -- nx format:check --base=94b1a210abd4ae777af4c976053d951e4edd5a51 --head=08681c55fc88f311601ea3e2de2bda979bc9d5be
• nx documentation --no-dte
• nx affected -t e2e-macos-ci --parallel=1 --base=94b1a210abd4ae777af4c976053d951e4edd5a51 --head=08681c55fc88f311601ea3e2de2bda979bc9d5be

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