feat: add option to disable trickle down event queue

[sfrank10]

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name: Pull Request
about: Create a pull request to help us improve
title: add option to disable trickle down event queue
assignees: @hoffstadt @v-ein

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Description:
This PR exposes Dear ImGui's io.ConfigInputTrickleEventQueue to the dearpygui python interface as a configure_app() option. This allows users to disable input event trickling.

Dear ImGui 1.87+ introduced event trickling (default: enabled), (release notes) which distributes rapid input events across multiple frames to prevent missed inputs at low framerates. However, this causes visible input lag with high-frequency input devices like barcode scanners — characters appear one-per-frame instead of all at once.

Note: Claude was used to find the source of the barcode input slowness and to implement the solution. The results were tested manually.

Closes #2633

Concerning Areas:

• The default is unchanged (True), so existing behavior is unaffected.
• At very low framerates (<30fps) with trickling disabled, rapid key-down/key-up pairs within a single frame may be collapsed, causing missed inputs. This is the tradeoff ImGui documented when introducing the feature. At typical framerates (60fps+) this is not an issue.