Add and display picture box array

[bobdavies2000]

Add and display 4 dynamically created picture boxes below the toolbar.

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Note

Dynamically creates and lays out four camera PictureBox controls below the toolbar and initializes them on form load.

• UI:
  • Camera previews: Add campic(3) and InitializeCameraPictureBoxes() to dynamically create 4 PictureBox controls (black background, zoom, fixed border) positioned below MainToolStrip, sized using client width and padding.
  • Startup: Call InitializeCameraPictureBoxes() in MainForm_Load to render the boxes on launch.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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