ci: install FLTK's X11/pango/cairo + static libstdc++ for the connector link

With dbus-devel added, the connector's Rust code compiles fully and reaches
the final link, which fails: the bundled FLTK GUI toolkit needs the X11
extension, pango and cairo shared libs, plus libsupc++.a. ld reports every
unresolved -l at once, so this is the complete set:
  -lXext -lXinerama -lXcursor -lXrender -lXfixes -lXft
  -lpango-1.0 -lpangoxft-1.0 -lpangocairo-1.0 -lcairo -lsupc++
The X/pango/cairo -devel packages are in AppStream; libstdc++-static
(libsupc++.a) is in CRB, so enable it for the transaction. GitHub's ubuntu
runners ship all of this, which is why the dedicated connector workflow
never needed it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.github/workflows/build_rocky.yml

@@ -20,13 +20,18 @@ jobs:
         run: |
           dnf update -y
           dnf install -y epel-release
-          dnf install -y gcc gcc-c++ git autoconf automake bison make zip cmake python3 python3-pip \
+          # --enablerepo=crb: libstdc++-static (libsupc++.a, needed by the
+          # bundled FLTK link) lives in Rocky's CodeReady Builder repo, which
+          # is disabled by default.
+          dnf install -y --enablerepo=crb gcc gcc-c++ git autoconf automake bison make zip cmake python3 python3-pip \
                          bzip2 patch mesa-libGL-devel libffi-devel fontconfig-devel      \
                          sqlite-devel bzip2-devel zlib-devel openssl-devel xz-devel      \
                          readline-devel ncurses-devel libffi-devel libuuid-devel git-lfs \
                          findutils xz byacc patchelf libxkbcommon-devel                 \
                          python3.11 python3.11-pip python3.11-tkinter \
-                         dbus-devel
+                         dbus-devel \
+                         libXext-devel libXinerama-devel libXcursor-devel libXrender-devel \
+                         libXfixes-devel libXft-devel pango-devel cairo-devel libstdc++-static
           python3 -m pip install typing_extensions aqtinstall
           git config --global --add safe.directory '*'
           python3.11 -c "import tkinter; print('Tk', tkinter.TkVersion)"

.github/workflows/build_rocky_arm.yml

@@ -32,12 +32,17 @@ jobs:
         run: |
           dnf update -y
           dnf install -y epel-release
-          dnf install -y gcc gcc-c++ git autoconf automake bison make zip cmake python3 python3-pip \
+          # --enablerepo=crb: libstdc++-static (libsupc++.a, needed by the
+          # bundled FLTK link) lives in Rocky's CodeReady Builder repo, which
+          # is disabled by default.
+          dnf install -y --enablerepo=crb gcc gcc-c++ git autoconf automake bison make zip cmake python3 python3-pip \
                          bzip2 patch mesa-libGL-devel libffi-devel fontconfig-devel      \
                          sqlite-devel bzip2-devel zlib-devel openssl-devel xz-devel      \
                          readline-devel ncurses-devel libffi-devel libuuid-devel git-lfs \
                          findutils xz byacc patchelf libxkbcommon-devel                 \
-                         python3-tkinter dbus-devel
+                         python3-tkinter dbus-devel \
+                         libXext-devel libXinerama-devel libXcursor-devel libXrender-devel \
+                         libXfixes-devel libXft-devel pango-devel cairo-devel libstdc++-static
           python3 -m pip install typing_extensions aqtinstall
           git config --global --add safe.directory '*'
           python3 -c "import tkinter; print('Tk', tkinter.TkVersion)"