Bug: Breadcrumbs overwrites property types every time it is loaded

[Signynt]

Describe the bug

When using properties as an edge source with Breadcrumbs, it will change the property type to "multitext" in the types.json every time the plugin is loaded (e.g when the Vault is opened).
This is frustrating if you want to keep a property as a different type, as you then have to change it back every time you open Obsidian.

My use case is that I want the property "prev" to always only contain a link to a single previous file, so I want to use the property type "text" for it. However every time I open Obsidian and this is reset, I need to manually change the property type back.

To Reproduce

Steps to reproduce the behavior:

1. Add a property field that is an edge source in breadcrumbs (e.g "prev") to a note.
2. Change the property type of "prev" to "text".
3. Add a link in the property field.
4. Close Obsidian and open it again.
5. The property field will have been set back to "multitext".

Expected behavior

Breadcrumbs shouldn't overwrite how the user set their property types.

Suggestion

Breadcrumbs should check the properties, to see if a property already has a specified type, and if it does, not do anything with it. If a property doesn't have a specified type yet, it can go ahead and add it.

Desktop (please complete the following information):

• OS: Tested on iOS (18.2) and MacOS (18.1)
• Breadcrumbs version: The latest V4 version at the time of writing
• Obsidian version: v1.7.5

[Signynt]

I've gone ahead and created a PR which solves this issue: #581