Add dependency install info to overview

Sources/Generator/Processing/DependencyCheck.swift

@@ -21,7 +21,7 @@ private func checkImageOptimAvailability() -> Bool {
         if version.count > 1 {
             print("            ImageOptim: \(version.map { "\($0)" }.joined(separator: "."))")
         } else {
-            print("            ImageOptim: Not found")
+            print("            ImageOptim: Not found, download app from https://imageoptim.com/mac and install using 'npm install imageoptim-cli'")
             return false
         }
     } catch {
@@ -36,7 +36,7 @@ private func checkMagickAvailability() -> Bool {
         let output = try safeShell("magick --version")
         guard let version = output.components(separatedBy: "ImageMagick ").dropFirst().first?
             .components(separatedBy: " ").first else {
-            print("                Magick: Not found")
+            print("                Magick: Not found, install using 'brew install imagemagick'")
             return false
         }
         print("                Magick: \(version)")
@@ -54,7 +54,7 @@ private func checkCwebpAvailability() -> Bool {
         if version.count > 1 {
             print("                 cwebp: \(version.map { "\($0)" }.joined(separator: "."))")
         } else {
-            print("                 cwebp: Not found")
+            print("                 cwebp: Not found, download from https://developers.google.com/speed/webp/download")
             return false
         }
     } catch {
@@ -71,7 +71,7 @@ private func checkAvifAvailability() -> Bool {
         if version.count > 1 {
             print("                  avif: \(version.map { "\($0)" }.joined(separator: "."))")
         } else {
-            print("                  avif: Not found")
+            print("                  avif: Not found, install using 'npm install avif'")
             return false
         }
     } catch {
@@ -90,7 +90,7 @@ private func checkUglifyJsAvailability() -> Bool {
             print("             uglify-js: \(version.map { "\($0)" }.joined(separator: "."))")
         } else {
             print("'\(output)'")
-            print("             uglify-js: Not found")
+            print("             uglify-js: Not found, install using 'npm install uglify-js'")
             return false
         }
     } catch {
@@ -108,7 +108,7 @@ private func checkCleanCssAvailability() -> Bool {
         if version.count > 1 {
             print("              cleancss: \(version.map { "\($0)" }.joined(separator: "."))")
         } else {
-            print("              cleancss: Not found")
+            print("              cleancss: Not found, install using 'npm install clean-css-cli'")
             return false
         }
     } catch {

install.sh

@@ -1,6 +1,12 @@
 #!/bin/bash
 # Install the required dependencies for CHGenerator
 
+# Install magick to resize images
+brew install imagemagick
+
+# Install avif to create AVIF versions of images
+npm install avif -g
+
 # Install the Javascript minifier (required if `minifyJavaScript = True`)
 # https://github.com/mishoo/UglifyJS
 npm install uglify-js -g