fix(js): add init generator placeholder

[nartc]

Current Behavior

nrwl/js does not have an initGenerator which would cause some confusion regarding our list command telling users to run init

Expected Behavior

nrwl/js:init is now just a placeholder that will print information about running nrwl/js:lib to generate a library which is the only generator that nrwl/js has (beside convert-to-swc that is probably not related to init)

Related Issue(s)

Fixes #

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✅ Successfully ran 17 targets

• nx affected --target=build --base=bbb08413c2611f25f7e496de6926d090f61e185f --head=68e7045d0de854fa6a1bb62f285aed52a067fd47 --parallel=3
• nx affected --target=e2e --base=bbb08413c2611f25f7e496de6926d090f61e185f --head=68e7045d0de854fa6a1bb62f285aed52a067fd47 --exclude=e2e-detox,e2e-js,e2e-next,e2e-workspace-create,e2e-workspace-integrations,e2e-workspace-core,e2e-react,e2e-web,e2e-angular-extensions,e2e-angular-core,e2e-cli,e2e-nx-plugin,e2e-cypress,e2e-node,e2e-linter,e2e-jest,e2e-a...
• nx affected --target=e2e --base=bbb08413c2611f25f7e496de6926d090f61e185f --head=68e7045d0de854fa6a1bb62f285aed52a067fd47 --exclude=e2e-storybook,e2e-react-native,e2e-detox --parallel=1
• nx affected --target=lint --base=bbb08413c2611f25f7e496de6926d090f61e185f --head=68e7045d0de854fa6a1bb62f285aed52a067fd47 --parallel=3
• nx affected --target=test --base=bbb08413c2611f25f7e496de6926d090f61e185f --head=68e7045d0de854fa6a1bb62f285aed52a067fd47 --parallel=1
• nx build typedoc-theme
• nx run nx-dev:sitemap
• nx run-e2e-tests e2e-cli
• nx run-e2e-tests e2e-cypress
• nx run-e2e-tests e2e-next
• nx run-e2e-tests e2e-node
• nx run-e2e-tests e2e-nx-plugin
• nx run-e2e-tests e2e-react
• nx run-e2e-tests e2e-react-native
• nx run-e2e-tests e2e-web
• nx run-e2e-tests e2e-workspace-integrations
• nx run-many --target=build --all --parallel=8 --exclude=docs,nx-dev-data-access-documents,nx-dev-e2e,nx-dev,nx-dev-feature-analytics,nx-dev-feature-conf,nx-dev-feature-doc-viewer,nx-dev-feature-search,nx-dev-feature-storage,nx-dev-feature-versions-and-flavors,nx-dev-ui-commands,nx-dev-ui-common,nx-dev-ui-home,nx-dev-ui-member-card,nx-dev-ui-sponsor...

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