build: Add libgtk+ to build dependencies

.github/workflows/build.yml

@@ -36,6 +36,7 @@ jobs:
           libcapstone-dev       \
           python3-dev           \
           libfreetype-dev       \
+          libgtk-3-dev          \
 
     - name: ✋ Build
       run: |

dist/ImHex-9999.ebuild

@@ -30,5 +30,6 @@ RDEPEND="${DEPEND}
 		sys-devel/llvm
 		dev-cpp/nlohmann_json
 		media-libs/glm
+		x11-libs/gtk+
 		"
 BDEPEND="${DEPEND}"

dist/get_deps_archlinux.sh

@@ -9,4 +9,5 @@ pacman -S --needed \
   capstone \
   glm \
   python3 \
-  freetype2
+  freetype2 \
+  gtk3

dist/get_deps_debian.sh

@@ -22,7 +22,8 @@ apt install \
   libmbedtls-dev \
   libstdc++-10-dev \
   python3-dev \
-  libfreetype-dev
+  libfreetype-dev \
+  libgtk-3-dev
 
 echo "Please consider this before running cmake (useful on e.g. Ubuntu 20.04):"
 echo "export CXX=g++-10"

dist/get_deps_fedora.sh

@@ -10,4 +10,5 @@ dnf install \
   mesa-libGL-devel \
   mbedtls-devel \
   python-devel \
-  freetype-devel
+  freetype-devel \
+  gtk3