docs/install.sh fixes: (#2781)

- fix lint
- fix colors
- add 'sudo' request before commands
- add pwndbg-macos-arm64 portable

docs/install.sh

@@ -9,6 +9,10 @@ BLUE='\033[0;34m'
 CYAN='\033[0;36m'
 NC='\033[0m' # No Color
 
+echo() {
+    printf "$@\n"
+}
+
 echoinfo() {
     echo "${BLUE}$@${NC}"
 }
@@ -132,6 +136,9 @@ else
         sudo() {
             ${*}
         }
+    else
+        echoinfo "Requesting 'sudo' privileges. You may be prompted for your password..."
+        sudo -v
     fi
 fi
 
@@ -155,8 +162,7 @@ Linux)
         ;;
     Darwin)
         case "$ARCH" in
-	# arm64) FILE="${BINARY_NAME}_${VERSION}_macos_arm64-portable.tar.xz" ;;
-	arm64) FILE="${BINARY_NAME}_${VERSION}_macos_amd64-portable.tar.xz" ;;
+            arm64) FILE="${BINARY_NAME}_${VERSION}_macos_arm64-portable.tar.xz" ;;
             x86_64) FILE="${BINARY_NAME}_${VERSION}_macos_amd64-portable.tar.xz" ;;
             *)
                 echoerr "Unsupported architecture: $ARCH"