Stencil: Storybook error when generating library

[erichstark]

Describe the bug
I want to generate library in my monorepo and it fails because storybook package is missing.

To Reproduce
Install package to nx
pnpm add @nxext/stencil -D -w

Generate library
nx g @nxext/stencil:library web-components --publishable --buildable --importPath=@lc/web-components --style=scss

Error:

nx g @nxext/stencil:library web-components --publishable --buildable --importPath=@o2/web-components --style=scss                                                                                               ✔ │ 3s │ 15:23:36 

 >  NX   Running global Nx CLI with PNPM may have issues.

   Prefer to use "pnpm" (https://pnpm.io/cli/exec) to execute commands in this workspace.
    TIP  create a shortcut such as: alias pnx="pnpm nx --"
   


>  NX  Generating @nxext/stencil:library


 >  NX   Cannot find module '@nrwl/storybook'

   Require stack:
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/@nxext+stencil@15.6.0_35y7vetm3zl3fgz26n4mrm47mi/node_modules/@nxext/stencil/src/generators/storybook-configuration/lib/add-dependencies.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/@nxext+stencil@15.6.0_35y7vetm3zl3fgz26n4mrm47mi/node_modules/@nxext/stencil/src/generators/storybook-configuration/generator.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/@nxext+stencil@15.6.0_35y7vetm3zl3fgz26n4mrm47mi/node_modules/@nxext/stencil/src/generators/make-lib-buildable/lib/update-tsconfig.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/@nxext+stencil@15.6.0_35y7vetm3zl3fgz26n4mrm47mi/node_modules/@nxext/stencil/src/generators/make-lib-buildable/make-lib-buildable.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/@nxext+stencil@15.6.0_35y7vetm3zl3fgz26n4mrm47mi/node_modules/@nxext/stencil/src/generators/library/generator.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/nx@15.8.5/node_modules/nx/src/config/workspaces.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/nx@15.8.5/node_modules/nx/src/config/configuration.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/nx@15.8.5/node_modules/nx/src/command-line/generate.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/nx@15.8.5/node_modules/nx/src/command-line/nx-commands.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/nx@15.8.5/node_modules/nx/bin/init-local.js
   - /Users/erich/Projects/O2/theme-libs/node_modules/.pnpm/nx@15.8.5/node_modules/nx/bin/nx.js
   - /Users/erich/.nvm/versions/node/v18.12.1/lib/node_modules/nx/bin/nx.js
   Pass --verbose to see the stacktrace.

Expected behavior
Generation of the library should not require to have that package.