@W-19978121:add runtimeEnvdetection util and reusable ErrorDisplay LWC

[ankitsinghkuntal09]

@W-19978121

What does this PR do?

1)Adds a reusable error viewer LWC to the test project:
c/errorDisplay: renders error title/message, meta (Error ID, Component, Timestamp), a labeled “Stack Trace” section (uses sanitizedStack when present, falls back to stack), props table, and “Copy Details” (copies raw JSON).

2)Adds a runtime environment utility:
c/runtimeEnv: isVSCodeExtension(), isBrowser(), getOriginSafe().

3)Updates hmrTest in the test project to import the utility and show on‑screen env status (Browser/VS Code, Origin).

What issues does this PR fix or reference?

W‑19978121 (Runtime Detection Utility and Reusable Error Display Component)
Parent: W‑19881670 (Implement Error Handling System)

[salesforce-cla]

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[ankitsinghkuntal09]

Closing this PR to de-duplicate scope with the consolidated work in progress (runtime error capture + integration). The env detection and reusable error viewer are being delivered as part of that flow, so we’ll avoid parallel changes here.