Add 'doesNotStartWith' operator to Neo.collection.Filter

To support advanced filtering scenarios, such as excluding certain classes from the Docs app tree view (e.g., Neo.ai classes that are not real source code), we need a doesNotStartWith operator in Neo.collection.Filter.

Currently, Neo.collection.Filter supports startsWith, but lacks the inverse operation.

Goal

Add doesNotStartWith to the operators static array and implement the corresponding static method in Neo.collection.Filter.

Implementation Details

1. Add 'doesNotStartWith' to Neo.collection.Filter.operators.
2. Implement static ['doesNotStartWith'](a, b) logic.
   • It should return true if string a does not start with string b.
   • Should handle non-string inputs gracefully (e.g., coerce to string or return safe default).
   • Should likely be case-insensitive to match startsWith behavior (check startsWith implementation for consistency).

Example Usage

// Filter out items that start with 'Neo.ai'
store.filter({
    property: 'className',
    operator: 'doesNotStartWith',
    value: 'Neo.ai'
});