Picker data source: Add support for pickable filters

[madsrasmussen]

This PR adds support for a pickable filter in a picker data source. This means that it is possible to disable specific tree items, collection items, or search result items based on custom logic.

How to test

There are currently two easy ways to test using the example:

1. The custom tree data source example implements a pickableFilter to prevent the selection of folders

2. The Documetn data source example implements a config on the Data Type where you can specific which Document Types to pick from:

[Copilot]

Pull Request Overview

This PR adds support for pickable filters in picker data sources, allowing developers to disable specific tree items, collection items, or search result items based on custom logic. This provides more granular control over what can be selected in picker interfaces.

Key changes:

• Added pickable filter properties to data source interfaces for tree, collection, and search scenarios
• Updated picker modal elements to use the appropriate pickable filters for search functionality
• Enhanced type safety by adding generic type parameters to data source interfaces

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
input-entity-data.context.ts	Passes pickable filters from data sources to modal configurations
tree-picker-modal.element.ts	Uses search-specific pickable filter with fallback logic
picker-search-result.element.ts	Updates type constraint for pickable filter to use search result items
tree-data-source/types.ts	Adds generic typing and treePickableFilter property
searchable-data-source/types.ts	Adds generic typing and searchPickableFilter property
data-source/types.ts	Adds generic typing for picked item types
collection-data-source/types.ts	Adds generic typing and collectionPickableFilter property
modal/types.ts	Adds pickable filter support to search configuration
collection-item-picker-modal.element.ts	Uses search-specific pickable filter with fallback logic
example-document-picker-data-source.ts	Implements pickable filter based on document types configuration
example-custom-picker-tree-data-source.ts	Implements pickable filters for custom tree and search scenarios
.vscode/settings.json	Adds spelling dictionary entries for "pickable" terms