Fix Loading Texture Path in GUI

[ladroid]

Description:

The current implementation requires explicitly writing a path for loading textures in the GUI. This should be replaced with a more user-friendly component that allows users to choose a file using a window explorer.

Affected Lines of Code:

File: src/gui/gui.rs
Lines: 213-216
Current Code:

// Example of the current implementation (lines 213-216)

let (_, tileset_width, tileset_height) = load_texture_from_path("your_path_to_tilemap.png")?;
// ... rest of the code

Proposed Solution:

Replace the explicit path string with a file chooser component that opens a window explorer to select the texture file. This will improve the usability of the GUI.

Steps to Reproduce:

1. Open the application.
2. Navigate to the texture loading section in the GUI.
3. Notice the requirement to manually enter the texture path.

Expected Behavior:

The GUI should present a button or similar component that opens a file chooser dialog, allowing the user to select the texture file from the file system.