Allow zoom to be set by markers

[mikefowler]

Overview

Adds a new configuration option to the plugin which allows a user to select the zoom "strategy". This change supports three strategies:

• Default: Zoom is set by the "Default zoom" configuration
• Bounds: Zoom is determined by the bounds of all markers
• Properties: Zoom is set to the widest (lowest number) zoom defined in the markers/notes, according to the property selected in the "Zoom property" configuration

Partially addresses: #12

@kepano or others, let me know what you think. Happy to iterate on this. At the moment I don't think the functionality is fully backwards-compatible, compared with the current behavior, but ideally it would be so.

Use-case

Primarily, embedding a Base inside a note that will display the coordinates and zoom level defined by that note.

For example, the following note uses an inline Base to render a map of San Francisco, with the zoom level set to 14.

---
title: San Francisco
categories:
  - "[[Places]]"
created: 2026-01-06
updated: 2026-01-06
coordinates:
  - "37.779379"
  - "-122.418433"
zoom: 14
---

```base
filters:
  and:
    - categories.containsAny(link("Places"))
    - file == this.file
views:
  - type: map
    name: Single Place
    coordinates: note.coordinates
    zoom: note.zoom
    zoomStrategy: properties
```

Screenshots