Add Prebid.js NPM integration

[aram356]

Description

Add Prebid.js as an NPM dependency and configure it for server-side bidding through Trusted Server.

Changes

• Add prebid.js ^10.18.0 as a dependency
• Add prebid integration module that configures s2sConfig
• Route bid requests through Trusted Server's /ad/auction endpoint
• Include required Prebid modules: prebidServerBidAdapter, consentManagement, consentManagementGpp

How it works

• Sets up server-side bidding with dynamic bidder discovery
• Routes all bid requests through the Trusted Server proxy
• Auto-configures Prebid on module load
• Shims pbjs.requestBids() to dynamically discover bidders from ad units

Bundle size impact

The unified bundle increases from ~32KB to ~218KB (gzipped: ~78KB) due to Prebid.js inclusion.

Related

• PR: Add Prebid.js NPM integration #242
• Depends on: Add configurable TLS certificate verification and fix port handling #246
• Parent: Unable to render prebidjs ads with NextJS #179