fix(linter): do not report obsolete devDependencies since they are not used in production files

[jaysoo]

This PR fixes an issue where we report devDependencies as obsolete for standalone projects. This happens because they are not used in production files. This means nx and all @nx/* packages are obsolete, and --fix will remove them from the workspaces.

In general, we do not care what users put into their devDependencies, we only need to check the ones that affect their consumers.

Current Behavior

Standalone projects will report things like this for nx lint.

  14:5  error  The "@nx/eslint-plugin" package is not used by "my-awesome-package"                                                            @nx/dependency-checks
  15:5  error  The "@nx/js" package is not used by "my-awesome-package"                                                                       @nx/dependency-checks
  16:5  error  The "@nx/linter" package is not used by "my-awesome-package"                                                                   @nx/dependency-checks
  18:5  error  The "@nx/workspace" package is not used by "my-awesome-package"                                                                @nx/dependency-checks
  19:5  error  The "@types/node" package is not used by "my-awesome-package"                                                                  @nx/dependency-checks
  20:5  error  The "@typescript-eslint/eslint-plugin" package is not used by "my-awesome-package"                                             @nx/dependency-checks
  21:5  error  The "@typescript-eslint/parser" package is not used by "my-awesome-package"                                                    @nx/dependency-checks
  22:5  error  The "@vitest/coverage-c8" package is not used by "my-awesome-package"                                                          @nx/dependency-checks
  23:5  error  The "@vitest/ui" package is not used by "my-awesome-package"                                                                   @nx/dependency-checks
  24:5  error  The "eslint" package is not used by "my-awesome-package"                                                                       @nx/dependency-checks
  25:5  error  The "eslint-config-prettier" package is not used by "my-awesome-package"                                                       @nx/dependency-checks
  26:5  error  The "nx" package is not used by "my-awesome-package"                                                                           @nx/dependency-checks
  27:5  error  The "nx-cloud" package is not used by "my-awesome-package"                                                                     @nx/dependency-checks
  28:5  error  The "prettier" package is not used by "my-awesome-package"                                                                     @nx/dependency-checks
  29:5  error  The "typescript" package is not used by "my-awesome-package"                                                                   @nx/dependency-checks
  31:5  error  The "vitest" package is not used by "my-awesome-package"                                                                       @nx/dependency-checks

Expected Behavior

Standalone projects should not report errors on legit dev dependencies.

Related Issue(s)

Fixes #

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 27, 2023 8:14pm

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✅ Successfully ran 8 targets

• linux nx affected --target=e2e --base=2dc6656f4ba081476cc230d8067c830ba078d2ea --head=7812bfcc69dab1e9430ab12f2a0f50c343762a05 --parallel=1
• linux nx affected --target=build --base=2dc6656f4ba081476cc230d8067c830ba078d2ea --head=7812bfcc69dab1e9430ab12f2a0f50c343762a05 --parallel=3
• linux nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• linux nx affected --target=lint --base=2dc6656f4ba081476cc230d8067c830ba078d2ea --head=7812bfcc69dab1e9430ab12f2a0f50c343762a05 --parallel=3
• linux nx affected --target=test --base=2dc6656f4ba081476cc230d8067c830ba078d2ea --head=7812bfcc69dab1e9430ab12f2a0f50c343762a05 --parallel=1
• nx-cloud record -- nx format:check --base=2dc6656f4ba081476cc230d8067c830ba078d2ea --head=7812bfcc69dab1e9430ab12f2a0f50c343762a05
• linux nx documentation --no-dte
• macos nx affected -t e2e-macos --parallel=1 --base=2dc6656f4ba081476cc230d8067c830ba078d2ea --head=7812bfcc69dab1e9430ab12f2a0f50c343762a05

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