move prettier and eslint config to root of repo (#12497)

## Description 

We currently have separate prettier and eslint configs in many different
directories. This combines all these configs into a single shared
config, while preserving the current differences via overrides. Enabling
prettier and eslint for additional directories, and standardizing the
places where the config is different will be left for a future PR

## Test Plan 

How did you test the new or updated feature?

---
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### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes