[FEATURE] Adding texture filtering modes (bilinear and nearest neighbor)

[adriengivry]

User Problem

When dealing with low-resolution files, such as pixel art, our goal is to achieve clear visibility of individual pixels.

Current state of the picture viewer when zooming on a low resolution image (pixel art):

Changes

• Removed MainHelper.cs and moved the PictureBox related helpers to a new class: QuickPictureBox.
• Implement a feature to change filtering mode (also called interpolation mode) in the QuickPictureBox.
• Added an option in the toolbar to select the filtering mode: Bilinear or Nearest Neighbor.
• Added 3 icons (6 including variants) and updates resource file:
  • white-filtering.png
  • white-bilinear.png
  • white-nearest-neighbor.png
  • black-filtering.png
  • black-bilinear.png
  • black-nearest-neighbor.png
• Added translations for "Filtering", "Bilinear" and "Nearest Neighbor" in all languages.

Additional Notes

• The bilinear filtering mode is set as the default mode.
• This feature is only available in the MainForm

Screenshots