ci: add Linux build workflow

.github/workflows/build-linux.yml

@@ -0,0 +1,82 @@
+name: Build KytyPS5 (Linux)
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main, master ]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies
+        shell: bash
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends --yes \
+            clang \
+            glslang-tools \
+            libgl1-mesa-dev \
+            libx11-dev \
+            libxcursor-dev \
+            libxext-dev \
+            libxfixes-dev \
+            libxi-dev \
+            libxrandr-dev \
+            libxss-dev \
+            lld \
+            ninja-build
+
+      - name: Install Qt 6.10.3
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: "6.10.3"
+          host: linux
+          target: desktop
+          arch: linux_gcc_64
+          cache: true
+
+      - name: Verify toolchain
+        shell: bash
+        run: |
+          git --version
+          cmake --version
+          ninja --version
+          clang++ --version
+          ld.lld --version
+          glslangValidator --version
+          echo "Qt6_DIR=$Qt6_DIR"
+
+      - name: Configure
+        shell: bash
+        run: |
+          cmake -S src -B _Build/linux \
+            -G Ninja \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DCMAKE_C_COMPILER=clang \
+            -DCMAKE_CXX_COMPILER=clang++ \
+            -DCMAKE_PREFIX_PATH="$Qt6_DIR"
+
+      - name: Build
+        shell: bash
+        run: |
+          cmake --build _Build/linux --target launcher --parallel
+
+      - name: Install
+        shell: bash
+        run: |
+          cmake --install _Build/linux --prefix _Build/linux/install
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: KytyPS5-Linux
+          path: _Build/linux/install/**
+          if-no-files-found: error

README.md

@@ -1,5 +1,7 @@
 # KytyPS5
 
+[![Windows Build](https://github.com/KytyPS5/KytyPS5/actions/workflows/build.yml/badge.svg)](https://github.com/KytyPS5/KytyPS5/actions/workflows/build.yml)
+[![Linux Build](https://github.com/KytyPS5/KytyPS5/actions/workflows/build-linux.yml/badge.svg)](https://github.com/KytyPS5/KytyPS5/actions/workflows/build-linux.yml)
 [![Platform](https://img.shields.io/badge/platform-Windows%20x64-0078D4.svg)](#system-requirements)
 [![Status](https://img.shields.io/badge/status-early%20development-orange.svg)](#current-status)
 [![License](https://img.shields.io/badge/license-GPL--2.0-blue.svg)](LICENSE)