feat(verify): add consolidated end-of-run summary report

[Bccorb]

What

seamless verify now prints a single consolidated summary report at the very end of a run, so you no longer have to scroll back through phase output to see how each layer did.

The report includes:

• Packages under test: source versions for --local runs (@seamless-auth/core, /express, /react), or the declared pins for released runs (@seamless-auth/express from the adapter-app, @seamless-auth/react from each web template), plus the source seamless-auth-api version in both modes.
• One line per conformance layer (API / adapter, and each web template) with its pass/fail status and duration.
• An overall verdict.

It is printed after teardown so it stays on screen. The existing live per-phase output (build logs, Playwright grids) is unchanged and still streams as the run progresses.

Why

The only end-of-run output before was a single pass/fail line, and teardown noise printed after it, so the result got pushed off screen on any real run. This gives a stable, scannable recap in one place.

Implementation notes

• Each layer now runs through a runLayer() helper that times it and records the outcome; the shared failed flag is unchanged.
• Version collection is fully best-effort (guarded reads); a missing manifest just drops that line and can never fail a run.
• Setup failures (for example Docker missing) surface in the same report as Verify aborted: <message>.

Testing

• npm run build (tsc) passes.
• Ran the full default seamless verify end to end: exit 0, all three layers pass (API / adapter, react-vite all flows, react-oauth scoped to @oauth).

────────────────────────────────────────────────────────
  Seamless Verify — summary
  SDK: released (npm)  ·  1m 31s total
────────────────────────────────────────────────────────
  Packages
    seamless-auth-api       0.2.3
    @seamless-auth/express  ^0.6.0
    @seamless-auth/react    ^0.4.0
────────────────────────────────────────────────────────
  ✔  API / adapter                 6.5s
  ✔  Web · react-vite (all flows)  7.6s
  ✔  Web · react-oauth (@oauth)    1.7s
────────────────────────────────────────────────────────
  ✔ Conformance passed — 3 layer(s).
────────────────────────────────────────────────────────