feat(devkit): add method to read installed Nx version

[AgentEnder]

Current Behavior

• There is no common way to read the installed Nx version
• There is no standard way for community plugin authors to check the versions of installed packages

Expected Behavior

• There are utils within nx that we use frequently throughout our own plugins for this, and they have existed for 14 months (as of 1/27/2023), which would be helpful for plugin authors. This PR exposes them, but wrapped with small functions s.t. we still have the option to decouple it from nx as needed.

Related Issue(s)

Fixes #

[vercel]

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Name	Status	Preview	Comments	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 22, 2023 at 0:15AM (UTC)

[nx-cloud]

☁️ Nx Cloud Report

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✅ Successfully ran 8 targets

• nx run-many -t e2e-macos --parallel=1 --exclude=e2e-detox
• nx affected --target=e2e --base=f8d49951b5eb3e2f01d325495b1fab23f32f5324 --head=8a92cb56dcc24a0c0a7a890f0485b06575624f97 --exclude=e2e-storybook,e2e-storybook-angular --parallel=1
• nx affected --target=test --base=f8d49951b5eb3e2f01d325495b1fab23f32f5324 --head=8a92cb56dcc24a0c0a7a890f0485b06575624f97 --parallel=1
• nx affected --target=build --base=f8d49951b5eb3e2f01d325495b1fab23f32f5324 --head=8a92cb56dcc24a0c0a7a890f0485b06575624f97 --parallel=3
• nx affected --target=lint --base=f8d49951b5eb3e2f01d325495b1fab23f32f5324 --head=8a92cb56dcc24a0c0a7a890f0485b06575624f97 --parallel=3
• nx run-many -t root-lint check-imports check-commit check-lock-files depcheck --parallel=1 --no-dte
• nx-cloud record -- nx format:check --base=f8d49951b5eb3e2f01d325495b1fab23f32f5324 --head=8a92cb56dcc24a0c0a7a890f0485b06575624f97
• nx documentation --no-dte

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[github-actions]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.