Fix collections property name conflict in Collections class

[tharropoulos]

Change Summary

What is this?

This change addresses a critical naming conflict in the Typesense PHP library where having a collection named "collections" causes an unhandled exception. The issue occurs because the Collections class has a property named collections that conflicts with the magic getter method (__get), causing it to return an empty array instead of the expected Collection object when accessing a collection named "collections".

This fix is particularly important for users who might use "collections" as a legitimate collection name (e.g., in e-commerce systems), preventing unexpected behavior and improving the robustness of the library.

Changes

Code Changes:

1. In src/Collections.php:
   • Renamed the private property $collections to $typesenseCollections to avoid naming conflicts
   • Updated all internal references to use the new property name:
     • In __get() method
     • In offsetExists() method
     • In offsetGet() method
     • In offsetSet() method
     • In offsetUnset() method
   • Behavior remains unchanged for all collection names, including "collections"

Context

• Issue reported in Laravel Scout repository (#896) by @Thiritin where using "collections" as a collection name causes an unhandled exception
• The bug occurs in Laravel Scout's TypesenseEngine when calling $this->typesense->getCollections()->{$collectionName}
• Previous implementation would return an empty array instead of a Collection object when $collectionName is "collections"
• This change ensures consistent behavior regardless of collection names

The fix maintains backward compatibility while resolving the naming conflict, allowing developers to use "collections" as a valid collection name in their applications.

PR Checklist

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[tharropoulos]

Added more commits to tackle the same issues in other parts of the codebase, where the name of a feature may collide with the user's name of said instance of a feature.