Map selection callout: preset on line 1, name on line 2

[tordans]

Problem

As a mapper selecting a feature on the map, I want the pushpin callout to always show the feature type (preset) on the first line and the object's display name on a second line when it exists, so that I can scan the map quickly and consistently understand what it is before what it's called.

Today the callout sometimes shows name=* and sometimes the preset label on line one, depending on context, which makes quick scanning inconsistent.

Implementation notes (by Cursor)

• Added OsmBaseObject.pushpinCalloutLines() returning (primary, secondary?). Primary uses preset matching (friendlyName() when non-generic), then the same fallbacks as friendlyDescription() without preferring givenName() first. Secondary is givenName() when non-empty and not redundant with primary (case/whitespace-normalized compare).
• Refactored friendlyDescription(withDetails:) to call shared pushpinCalloutPrimary(withDetails:) after the existing name-first branch — other call sites unchanged.
• MapView.refreshPushpinText() now calls PushPinView.setCallout(primary:secondary:); new objects still get a single “(new object)” line.
• PushPinView uses two CATextLayers (headline + subheadline), shared max width (300pt), wrapping/truncation, and balloon height includes both lines when secondary is set.
• Unit tests in OsmBaseObject_PushpinCalloutTestCase.swift cover preset+name, preset-only, name-only, redundant secondary, and that friendlyDescription() still prefers name elsewhere.

Testing notes (by @tordans)

Manual

1. Objects with only name → line 1 should still be useful (preset match or fallback); line 2 shows the name when distinct from line 1.
2. Objects with preset + name (e.g. shop=convenience + name=Foo) → line 1 preset label, line 2 name; secondary typography visibly smaller.
3. Long name / long preset string → truncation and balloon size; crosshair opacity behavior in PushPinView still sane.
4. After tag edits in the POI editor, return to map → callout updates via refreshPushpinText().

Automated

• Run GoMapTests target (app test host): OsmBaseObject_PushpinCalloutTestCase — redundancy helper, shop=convenience scenarios, name-only fallback, redundant name omitted.