feat: Respect Vite base for linking asset placeholders

[gching]

Ref #837

This PR adds in support for the Vite base for the linker for asset placeholders. This is needed since in the current second workers linker build, we are statically replacing asset placeholders to final paths that don't respect this base setting

Not a main contributor, so this might be the wrong spot. Let me know if this logic should be elsewhere

Changes

• Store reference to config
• Pass in base to linkWorkerBundle to prepend if it exists
• Simple tests

Before change

With Vite base = https://example.com/

// Before linking
const stylesheet = "rwsdk_asset:/src/styles.css";
const logo = "rwsdk_asset:/src/logo.svg";

// After linking
// Note not including the base
const stylesheet = "/assets/styles.123.css"
const logo = "/assets/logo.abc.svg"

After change

With Vite base = https://example.com

// Before linking
const stylesheet = "rwsdk_asset:/src/styles.css";
const logo = "rwsdk_asset:/src/logo.svg";

// After linking
// Note not including the base
const stylesheet = "https://example.com/assets/styles.123.css"
const logo = "https://example.com/assets/logo.abc.svg"

[justinvdm]

Thank you @gching, this looks solid! Merging and releasing

[justinvdm]

Released in https://github.com/redwoodjs/sdk/releases/tag/v1.0.0-beta.18