Mention run settings in global settings; clarify `enablePrePostScripts` and `ignoreScripts` interaction

[sdavids]

The three settings (enablePrePostScripts, scriptShell, and shellEmulator) mentioned on this page:
https://pnpm.io/cli/run#pnpm-workspaceyaml-settings

should also be included on this page:

https://pnpm.io/settings

---

Also, it should be clarified how enablePrePostScripts relates to ignoreScripts:

pnpm-workspace.yaml

enablePrePostScripts: true
ignoreScripts: true

or

pnpm-workspace.yaml

enablePrePostScripts: true

and

.npmrc

ignore-scripts=true

Are the pre-/post-scripts ignored with this setting combination, i.e. enablePrePostScripts has a lower precedence then ignoreScripts or is it the other way round?