Add Multi-Sample Creation in Reactions with Smart Sorting

[alizaib1217]

What This Does

This PR makes it way easier to work with reactions by letting you create multiple samples at once and automatically organizing them in the order they're used in the reaction.

Key Features

🔹 Quick Sample Creation with Plus Button

Added a handy "+" button next to reactions so you can quickly add new samples without going through multiple steps. You can even create several samples at the same time with different names, which is super useful when setting up complex reactions.

🔹 Choose the Sample's Role

New dropdown lets you pick what type of sample you're adding - is it a starting material, reactant, solvent, or product? This makes it crystal clear what each sample does in your reaction.

🔹 Automatic Chemical Ordering

Here's the cool part: no matter what order you create your samples in, they automatically organize themselves the way a chemist would expect:

• Starting Materials first
• Then Reactants
• Followed by Solvents
• Products next
• Everything else (like analyses) at the end

So if you add a product, then a starting material, then a reactant - they'll automatically rearrange to show starting material → reactant →product. Much cleaner!

🔹 Fixed Parent-Child Relationships

Fixed some bugs with how samples and their nested folders (like analyses) connect to each other in the folder tree.