Reapply support for X11 screenshare (#28160)

Reapplies #27807 after [revert due to not building on
ARM](https://github.com/zed-industries/zed/pull/28141) by updating scap
to include [a fix to its build on
ARM](08f0a01417)

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

script/linux

@@ -28,6 +28,7 @@ if [[ -n $apt ]]; then
     libasound2-dev
     libfontconfig-dev
     libwayland-dev
+    libx11-xcb-dev
     libxkbcommon-x11-dev
     libssl-dev
     libzstd-dev
@@ -76,6 +77,7 @@ if [[ -n $dnf ]] || [[ -n $yum ]]; then
     alsa-lib-devel
     fontconfig-devel
     wayland-devel
+    libxcb-devel
     libxkbcommon-x11-devel
     openssl-devel
     libzstd-devel
@@ -144,6 +146,7 @@ if [[ -n $zyp ]]; then
     gzip
     jq
     libvulkan1
+    libxcb-devel
     libxkbcommon-devel
     libxkbcommon-x11-devel
     libzstd-devel
@@ -174,6 +177,7 @@ if [[ -n $pacman ]]; then
     fontconfig
     wayland
     libgit2
+    libxcb
     libxkbcommon-x11
     openbsd-netcat
     openssl