fix(stardust): migrate eval criteria.json to tessl weighted_checklist…

[mandeep294]

… schema

The Release Skills workflow's tessl plugin publish step began enforcing the new criteria.json schema between 2026-07-04 and 2026-07-07, failing the stardust plugin publish with:

Invalid criteria.json (in migrate-self-contained-bundle):
context: expected string, received undefined
type: expected "weighted_checklist"
checklist: expected array, received undefined

Failed actions:
https://github.com/adobe/skills/actions/runs/28875097726/job/85647927305

All 9 stardust eval criteria.json still used the legacy {name, total, criteria:[{id, weight, description}]} shape. Convert them to the {context, type: "weighted_checklist", checklist:[{name, max_score, description}]} shape the other Adobe-skills plugins already use.

• id -> name (identifier preserved, lossless)
• weight -> max_score (sums to 100 per eval, unchanged)
• description kept verbatim
• context authored per eval from the README coverage table
• README Format/Running sections updated to describe the new shape

Item counts and weight sums verified unchanged for all 9 evals.

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.