refactor: Simplified pkg_install and pkg_remove

`pkg_install` and `pkg_remove` are just wrappers that map aliases and
directly invooke the system package manager.

- They do not manage state or inject rollback commands

lib/platform.sh

@@ -86,18 +86,7 @@ pkg_install() {
         if ! pkg_check "$pkg"; then
             to_install+=("$pkg")
         fi
-        
-        # Reference counting logic
-        if [ -n "${BOOTSTRAP_CURRENT_TOOL:-}" ] && [ -n "${BOOTSTRAP_PACKAGES_DIR:-}" ]; then
-            local ref_file="$BOOTSTRAP_PACKAGES_DIR/$pkg"
-            if ! grep -q "^${BOOTSTRAP_CURRENT_TOOL}$" "$ref_file" 2>/dev/null; then
-                echo "$BOOTSTRAP_CURRENT_TOOL" >> "$ref_file"
-                # Register rollback command
-                if type add_rollback_cmd >/dev/null 2>&1; then
-                    add_rollback_cmd "pkg_remove $pkg"
-                fi
-            fi
-        fi
+
     done
 
     if [ ${#to_install[@]} -eq 0 ]; then
@@ -174,24 +163,6 @@ pkg_remove() {
             is_installed=1
         fi
 
-        if [ -n "${BOOTSTRAP_CURRENT_TOOL:-}" ] && [ -n "${BOOTSTRAP_PACKAGES_DIR:-}" ]; then
-            local ref_file="$BOOTSTRAP_PACKAGES_DIR/$pkg"
-            if [ -f "$ref_file" ]; then
-                if [ "$is_installed" -eq 0 ]; then
-                    log_info "Package '$pkg' is no longer installed system-wide. Cleaning up stale reference."
-                    rm -f "$ref_file"
-                else
-                    # Remove this tool from the reference file
-                    sed -i "/^${BOOTSTRAP_CURRENT_TOOL}$/d" "$ref_file"
-                    if [ -s "$ref_file" ]; then
-                        log_info "Skipping removal of '$pkg'; it is required by other tools."
-                        continue
-                    else
-                        rm -f "$ref_file"
-                    fi
-                fi
-            fi
-        fi
         
         if [ "$is_installed" -eq 1 ]; then
             to_remove+=("$pkg")