feat: restructure illustration package generated artifacts

[adrienzheng-cb]

What changed? Why?

1. Migrate — Moves existing CJS wrapper files from the old flat layout to the new nested layout, updating the manifest paths:

• svgJs/light/ → svgJs/cjs/light/
• svgJs/dark/ → svgJs/cjs/dark/
• svgJs/themeable/ → svgJs/cjs/themeable/

2. Backfill — For any illustration that has a raw svg/themeable/*.svg on disk but is missing its JS wrappers, it reads the SVG content and writes the missing files:

• CJS wrapper → svgJs/cjs/themeable/<name>-<version>.js (module.exports = { content: \...` }`)
• ESM wrapper → svgJs/esm/themeable/<name>-<version>.js (export default \...``)

After writing the wrappers (or if they already existed), it deletes the raw .svg file and removes svgThemed from the manifest — since the SVG content is now embedded in the JS wrappers and the raw file is no longer needed.

3. Regenerate maps — For every illustration type that had any changes, it regenerates:

• svgJsMap.ts — maps each illustration name to { light, dark, themeable? } lazy CJS loaders
• svgEsmMap.ts — maps each illustration name to { themeable } lazy ESM dynamic imports (only for items that have a themeable variant)

Root cause (required for bugfixes)

UI changes

iOS Old	iOS New
old screenshot	new screenshot

Android Old	Android New
old screenshot	new screenshot

Web Old	Web New
old screenshot	new screenshot

Testing

How has it been tested?

• Unit tests
• Interaction tests
• Pseudo State tests
• Manual - Web
• Manual - Android (Emulator / Device)
• Manual - iOS (Emulator / Device)

Testing instructions

Illustrations/Icons Checklist

Required if this PR changes files under packages/illustrations/** or packages/icons/**

• verified visreg changes with Terran (include link to visreg run/approval)
• all illustration/icons names have been reviewed by Dom and/or Terran

Change management

type=routine
risk=low
impact=sev5

automerge=false

[cb-heimdall]

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