Update Dear ImGui to v1.92.5-docking

[Copilot]

Updates Dear ImGui from v1.91.5 to v1.92.5-docking, preserving existing configuration and fixing API compatibility.

Changes

• Library files: Updated all core ImGui files, backends (SDL2, OpenGL2), and STB headers to v1.92.5-docking
• Configuration: Preserved IMGUI_DEFINE_MATH_OPERATORS define in imconfig.h
• API migration: Replaced deprecated TabMinWidthForCloseButton with TabCloseButtonMinWidthUnselected

// Before
style.TabMinWidthForCloseButton = 0.0f;

// After  
style.TabCloseButtonMinWidthUnselected = 0.0f;

Note: Used the docking branch specifically since the project relies on docking features (ImGuiConfigFlags_DockingEnable, DockSpaceOverViewport, ConfigDockingWithShift).

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https /usr/lib/apt/methods/https (dns block)
• https://api.github.com/repos/ocornut/imgui/releases/latest
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

update dear imgui files to latest released version. Incorporate prior config from imconfig.h into the new one. Make sure everything works after the update.

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