docs(nx-dev): add credit pricing section

[bcabanes]

It renames the ResourceClasses component to CreditPricing and updates its references throughout the application. It also includes additional non-compute pricing information and a more detailed breakdown of credit costs associated with various CI/CD operations for Nx Cloud.

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Name	Status	Preview	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	Nov 15, 2024 3:11pm

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- [`nx affected --targets=lint,test,build,e2e,e2e-ci --base=88017bb96cc011fe3665f415f307469c799dc6fc --head=f20ab667b5955194c3d11e7dcaed30bc031379a6 --parallel=3`](https://staging.nx.app/runs/yaHfjI4Mdf?utm_source=pull-request&utm_medium=comment) - [`nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte`](https://staging.nx.app/runs/CQTEpUfHQl?utm_source=pull-request&utm_medium=comment) - [`nx-cloud record -- nx format:check --base=88017bb96cc011fe3665f415f307469c799dc6fc --head=f20ab667b5955194c3d11e7dcaed30bc031379a6`](https://staging.nx.app/runs/RXkIqq06Ss?utm_source=pull-request&utm_medium=comment) - [`nx documentation --no-dte`](https://staging.nx.app/runs/MuQajt6kim?utm_source=pull-request&utm_medium=comment)

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