Design + plan: adapt Mocktioneer to edgezero #269 (extensible CLI)

[aram356]

What this PR is

Design spec + implementation plan only — no implementation code yet. This lands the agreed-upon design and a task-by-task plan for adapting Mocktioneer to the breaking stackpop/edgezero#269 ("EdgeZero CLI Extensions"), so the approach can be reviewed before code is written. Implementation will follow on this branch (or a child branch) by executing the plan.

Contents

• docs/superpowers/specs/2026-06-11-edgezero-extensible-cli-adaptation-design.md — the design (converged over 5 review rounds).
• docs/superpowers/plans/2026-06-15-edgezero-extensible-cli-adaptation.md — a 13-task, TDD, exact-code implementation plan.
• docs/.prettierignore — exclude superpowers/ from the docs Prettier gate.

Scope of the planned change (for reviewers)

• Compat: repin the six edgezero-* git deps main → feature/extensible-cli; drop the include_str!(manifest) arg from every adapter run_app; migrate the Spin adapter to spin-sdk ~6.0 / wasm32-wasip2 (Fastly stays wasm32-wasip1).
• Typed config: add a validated MocktioneerConfig (bid_cpm), a mocktioneer.toml, and a mocktioneer-cli crate mirroring edgezero's generated <name>-cli.
• Runtime: bid_cpm is resolved from the bound config store for both the OpenRTB and APS paths, falling back to FIXED_BID_CPM when no store is bound; malformed values error, a malformed/absent file degrades to the default.
• Plumbing: [stores.config] in the manifest + Spin runtime-config.toml, Dockerfile manifest pre-copy, .gitignore .edgezero/, docs (wasip2 + "$0.20 default" pricing + edgezero-cli-vs-mocktioneer-cli), and a config validate --strict CI gate.

Notes

• Base is main, which already carries the strict-clippy + PR #257 edgezero adaptation (via PR Adopt edgezero strict-clippy gate and PR #257 API #108).
• edgezero #269 is still open; deps will pin to its branch during implementation and re-pin to edgezero main after it merges.
• This PR is docs-only, so existing Rust/docs CI runs against unchanged code.