docs(e2e): how to trigger E2E tests locally and on GitHub

[EnderOfWorlds007]

Adds docs/e2e-running-tests.md — quick-reference for every entry point.

Complements docs/e2e-bootstrap.md (maintainer setup): this is for the daily 'how do I run the suite' question.

Sections

• Quick reference table (every command + trigger, one-line each)
• Local execution (modes, vitest passthrough, reading results)
• GitHub execution (triggers, watching results, workflow_dispatch, auto-issue)
• Common operations FAQ
• Cross-links

Test plan

• All commands in the doc are copy-pasteable and resolve to real targets
• Tables match the actual workflow + script content
• Cross-references to e2e-bootstrap.md and CLAUDE.md are correct

[github-actions]

Dev build ready — try this branch:

curl -fsSL https://raw.githubusercontent.com/paritytech/playground-cli/main/install.sh | VERSION=dev/docs/e2e-running bash

[github-actions]

E2E Test Pass · ✅ PASS

Tag: e2e-ci-pr · Branch: docs/e2e-running · Commit: a6a4da6 · Run logs

Cell	Result	Time
pr-deploy-frontend	✅ PASS	8m14s
pr-deploy-foundry	✅ PASS	1m55s
pr-init-session	✅ PASS	1m15s
pr-mod	✅ PASS	1m22s
pr-preflight	✅ PASS	3m19s
pr-install	✅ PASS	0m39s
${{ matrix.cell }}	⏭️ SKIP	0m-1s
${{ matrix.cell }}	⏭️ SKIP	0m-1s

Sentry traces: view spans for this run