docs(kaneai): update Run with Evidence Report for the new Mode toggle

[anubhavsinghmaar]

Why

The Run with HyperExecute panel changed. Choosing the report is no longer a Run with Evidence Report button with Run with Classic Report in a dropdown. Build Parameters now has a Mode setting with Evidence Reporting and Classic Reporting, and one Execute button.

The live page still shows the old panel: Run with Evidence Report.

What changed

docs/kaneai-hyperexecute-test-run-execution.md, the Run with Evidence Report section only:

• Screenshot replaced at the same path, so no other page or link is affected: evidence-run-with-evidence-report.webp, WebP, 1600x827, 74 KB (the file it replaces was 72 KB; the repo limit is 100 KB). Quality 95, no palette quantization, text checked as legible after compression.
• Steps rewritten to describe the toggle: Mode under Build Parameters, Evidence Reporting selected by default, Classic Reporting for the standard report, then Execute.
• Alt text updated to match the new screenshot.
• The note no longer says the panel "offers only Run with Classic Report", since that button is gone. It now says the run produces the Classic report.

The heading and its anchor #run-with-evidence-report are unchanged.

Verified

• Rendered locally on the Docusaurus dev server: the new screenshot loads (1600x827) and the section reads correctly.
• Image size and dimensions match the house rules (WebP, 1600 px wide, under 100 KB).
• Only two files touched, no lockfile churn.

Follow-up, not in this PR

Step 5 higher on the same page has a second screenshot of this panel (run-with-hyperexecute-drawer.webp) taken from a run that is not Evidence-eligible. It still shows the old Run with Classic Report button and the "You're missing out on Evidence Report" footer, and the paragraph under it says the execute button names the report. That needs a fresh screenshot of the panel for an ineligible run, which I will raise separately.

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