Install clang with the Rust dev environment instead of for everyone (#14967)

Nothing in the base install builds with clang: Qt apps and Ruby's native
gems compile with gcc, and Ruby comes prebuilt from mise. Rust crates that
use bindgen, including rb-sys gems, need libclang, so the Rust dev
environment installs it. llvm was unused even there.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

bin/omarchy-install-dev-env

@@ -92,6 +92,9 @@ phoenix)
   ;;
 rust)
   echo -e "Installing Rust...\n"
+  # Crates that generate C bindings with bindgen, including Ruby gems built
+  # with rb-sys, load libclang from clang.
+  omarchy-pkg-add clang
   bash -c "$(curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs)" -- -y
   ;;
 java)

install/omarchy-base.packages

@@ -15,7 +15,6 @@ bolt
 brightnessctl
 btop
 chromium
-clang
 cliamp
 cups
 cups-filters
@@ -77,7 +76,6 @@ libsecret
 libvips
 libyaml
 libreoffice-fresh
-llvm
 localsend
 lua51
 luarocks