qml, doc: Re-add links to CI build artifacts

This reverts commit 9645d37.

Author: hebasto

.github/PULL_REQUEST_TEMPLATE.md

@@ -41,3 +41,12 @@ needs to pass a lot of eyes and requires non-zero or even substantial time
 effort to review. There is a huge lack of active reviewers on the project, so
 patches often sit for a long time.
 -->
+
+<!--
+Links for Windows and macOS build artifacts. Replace <PR> with the assigned pull request number.
+
+[![Windows](https://img.shields.io/badge/OS-Windows-green)](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/win64/insecure_win_gui.zip?branch=pull/<PR>)
+[![Intel macOS](https://img.shields.io/badge/OS-Intel%20macOS-green)](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/macos/insecure_mac_gui.zip?branch=pull/<PR>)
+[![Apple Silicon macOS](https://img.shields.io/badge/OS-Apple%20Silicon%20macOS-green)](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/macos_arm64/insecure_mac_arm64_gui.zip?branch=pull/<PR>)
+[![ARM64 Android](https://img.shields.io/badge/OS-Android-green)](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/android/insecure_android_apk.zip?branch=pull/<PR>)
+-->

src/qml/README.md

@@ -4,6 +4,19 @@
 
 This directory contains the source code for an experimental Bitcoin Core graphical user interface (GUI) built using the [Qt Quick](https://doc.qt.io/qt-5/qtquick-index.html) framework.
 
+Insecure CI artifacts are available for local testing of the master branch, avoiding the need to build:
+- for Windows: [`insecure_win_gui.zip`](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/win64/insecure_win_gui.zip)
+- for Intel macOS: [`insecure_mac_gui.zip`](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/macos/insecure_mac_gui.zip)
+- for Apple Silicon macOS: [`insecure_mac_arm64_gui.zip`](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/macos_arm64/insecure_mac_arm64_gui.zip)
+- for ARM64 Android: [`insecure_android_apk.zip`](https://api.cirrus-ci.com/v1/artifact/github/bitcoin-core/gui-qml/android/insecure_android_apk.zip)
+
+Note: For Apple Silicon macOS machines, the binary must be signed before it can
+be ran. To apply a signature, run the following on the unzipped CI artifact:
+
+```
+codesign -s - ./Downloads/insecure_mac_arm64_gui
+```
+
 ## Goals and Limitations
 
 The current Bitcoin Core GUI has gathered enough technical debt and hacked on features; it is time to begin anew.