[Deliverable] Optimise Browser Bootstrapping

[weboko]

Owner: js-waku

Feature: js-waku

FURPS:

• R1. From an operating state, a node can resume transmitting messages within 1 second after disconnection; in a network with 1 bootstrap node, 100 service nodes and 500 browser nodes (Vac-DST)
• P1. From a cold start, a node can start transmitting messages within 5 seconds; in a network with 1 bootstrap node, 100 service nodes and 500 browser nodes (Vac-DST)

Checklist:

• Specs: link to specs and/or API definition
• Code: link to GitHub issues/PRs/Epic
• Dogfood: link to dogfooding session/artefact
• Docs: links to README.md or docs.waku.org (TBD)