feat: create a new package @waku/discovery to encapsulate all discovery mechanisms available within Waku

[danisharora099]

This is a feature request

Problem

We currently have 3 discovery options available within Waku:

• DNS Discovery
• Peer Exchange
• Local Peer Cache (recently added: feat: local discovery #1811

For this, we have 3 separate packages, which might only increase with time.

Proposed Solutions

Create a generalised package @waku/discovery to encapsulate all the available discovery mechanisms.

Acceptance Criteria

• Deprecate @waku/peer-exchange, @waku/dns-discovery, @waku/local-peer-cache
• Create @waku/discovery
• Export Peer Exchange, DNS Discovery, Local Peer Cache from @waku/discovery