Update GitHub Actions for PR Summary Generation (#79)

* Adding GitHub actions for generated PR summaries

* Generate PR summary for any PR opened without a description

Removes the bot-only filter so the workflow triggers for all PRs
that are opened with an empty body, ensuring the formatted summary
is auto-generated regardless of who creates the PR.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add /generate-summary comment command to trigger PR summary

Users can now comment '/generate-summary' on any PR to regenerate
the formatted description on demand. The workflow still auto-triggers
for PRs opened without a body. A rocket emoji reaction confirms the
command was received.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Harden GitHub Actions workflows through environment variables

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Updated samples for 2604 release (#68)

Syncing kit and HandheldBestPractices updates (#63)

* Syncing kit and HandheldBestPractices updates

* Updated .vcxproj files for HH sample and including d3dx12.h in imgui Kit

Adding imgui license

Updating DirectXTK12 mouse and keyboard for GameInput updates

Updating samples for GameInput3, DirectXTK12, BWOI, and CMake (#49)

* Updating for GameInput3, DirectXTK12, BWOI, and CMake

Updated samples for 2410 release (#46)

* 2410 release update

* Pull Request 3948: Updating PlayFabStore sample to use new property name for 2410 GDK

2406 release update (#42)

2403 release update (#40)

Updated samples for 2310 release (#36)