docs(nxdev): add personas to intro

[isaacplmann]

Adds personas to the docs intro

[nx-cloud-staging[bot]]

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✅ Successfully ran 12 targets

• nx affected --target=e2e --base=2ebc4f421b994f1d5de17963dfe1432aca5066b0 --head=e25c143e8231e0b01c6595f0a60c95e57cb01807 --exclude=e2e-storybook,e2e-storybook-angular,e2e-react-native,e2e-detox,e2e-make-angular-cli-faster --parallel=1
• nx affected --target=build --base=2ebc4f421b994f1d5de17963dfe1432aca5066b0 --head=e25c143e8231e0b01c6595f0a60c95e57cb01807 --parallel=3
• nx-cloud record -- yarn depcheck
• nx affected --target=lint --base=2ebc4f421b994f1d5de17963dfe1432aca5066b0 --head=e25c143e8231e0b01c6595f0a60c95e57cb01807 --parallel=3
• nx affected --target=test --base=2ebc4f421b994f1d5de17963dfe1432aca5066b0 --head=e25c143e8231e0b01c6595f0a60c95e57cb01807 --parallel=1
• nx-cloud record -- yarn nx workspace-lint
• nx-cloud record -- yarn check-lock-files
• nx-cloud record -- yarn check-commit
• nx-cloud record -- yarn nx format:check --base=2ebc4f421b994f1d5de17963dfe1432aca5066b0 --head=e25c143e8231e0b01c6595f0a60c95e57cb01807
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn documentation
• nx build typedoc-theme

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Name	Status	Preview	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	Oct 13, 2022 at 6:24PM (UTC)

[juristr]

(do not merge, needs some fixing)

[github-actions[bot]]

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.