Update docs regarding native cmd for gradle plugin

Author: carhartl

README.md

@@ -48,7 +48,7 @@ lib('generic.EndWithNewlineStep')                +'{{yes}}       | {{yes}}
 lib('generic.IndentStep')                        +'{{yes}}       | {{yes}}      | {{no}}       | {{no}}  |',
 lib('generic.Jsr223Step')                        +'{{no}}        | {{yes}}      | {{no}}       | {{no}}  |',
 lib('generic.LicenseHeaderStep')                 +'{{yes}}       | {{yes}}      | {{yes}}      | {{no}}  |',
-lib('generic.NativeCmdStep')                     +'{{no}}        | {{yes}}      | {{no}}       | {{no}}  |',
+lib('generic.NativeCmdStep')                     +'{{yes}}       | {{yes}}      | {{no}}       | {{no}}  |',
 lib('generic.ReplaceRegexStep')                  +'{{yes}}       | {{yes}}      | {{no}}       | {{no}}  |',
 lib('generic.ReplaceStep')                       +'{{yes}}       | {{yes}}      | {{no}}       | {{no}}  |',
 lib('generic.TrimTrailingWhitespaceStep')        +'{{yes}}       | {{yes}}      | {{no}}       | {{no}}  |',
@@ -87,7 +87,7 @@ extra('wtp.EclipseWtpFormatterStep')             +'{{yes}}       | {{yes}}
 | [`generic.IndentStep`](lib/src/main/java/com/diffplug/spotless/generic/IndentStep.java) | :+1:       | :+1:      | :white_large_square:       | :white_large_square:  |
 | [`generic.Jsr223Step`](lib/src/main/java/com/diffplug/spotless/generic/Jsr223Step.java) | :white_large_square:        | :+1:      | :white_large_square:       | :white_large_square:  |
 | [`generic.LicenseHeaderStep`](lib/src/main/java/com/diffplug/spotless/generic/LicenseHeaderStep.java) | :+1:       | :+1:      | :+1:      | :white_large_square:  |
-| [`generic.NativeCmdStep`](lib/src/main/java/com/diffplug/spotless/generic/NativeCmdStep.java) | :white_large_square:        | :+1:      | :white_large_square:       | :white_large_square:  |
+| [`generic.NativeCmdStep`](lib/src/main/java/com/diffplug/spotless/generic/NativeCmdStep.java) | :+1:       | :+1:      | :white_large_square:       | :white_large_square:  |
 | [`generic.ReplaceRegexStep`](lib/src/main/java/com/diffplug/spotless/generic/ReplaceRegexStep.java) | :+1:       | :+1:      | :white_large_square:       | :white_large_square:  |
 | [`generic.ReplaceStep`](lib/src/main/java/com/diffplug/spotless/generic/ReplaceStep.java) | :+1:       | :+1:      | :white_large_square:       | :white_large_square:  |
 | [`generic.TrimTrailingWhitespaceStep`](lib/src/main/java/com/diffplug/spotless/generic/TrimTrailingWhitespaceStep.java) | :+1:       | :+1:      | :white_large_square:       | :white_large_square:  |

plugin-gradle/README.md

@@ -77,6 +77,7 @@ Spotless supports all of Gradle's built-in performance features (incremental bui
     - [eclipse web tools platform](#eclipse-web-tools-platform)
       - css, html, js, json, xml
 - **Language independent**
+  - [Generic steps](#generic-steps)
   - [License header](#license-header) ([slurp year from git](#retroactively-slurp-years-from-git-history))
   - [How can I enforce formatting gradually? (aka "ratchet")](#ratchet)
   - [`spotless:off` and `spotless:on`](#spotlessoff-and-spotlesson)
@@ -715,6 +716,20 @@ Unlike Eclipse, Spotless WTP ignores per default external URIs in schema locatio
 external entities. To allow the access of external URIs, set the property `resolveExternalURI`
 to true.
 
+## Generic steps
+
+[Prettier](#prettier), [eclipse wtp](#eclipse-web-tools-platform), and [license header](#license-header) are available in every format, and they each have their own section. As mentioned in the [quickstart](#quickstart), there are a variety of simple generic steps which are also available in every format, here are examples of these:
+
+```gradle
+spotless {
+  // run a native binary
+  format 'terraform', {
+    target 'src/**/*.tf', 'src/**/*.tfvars' // you have to set the target manually
+    nativeCmd('terraform', '/opt/homebrew/bin/terraform', ['fmt', '-']) // name, path to binary, additional arguments
+  }
+}
+```
+
 <a name="license-header-options"></a>
 
 ## License header