docs: use new customUsage feature in docs

Signed-off-by: Michael Molisani <git@molisani.us>

docs/docs/features/argument-parsing/examples/boolean-flag.txt

@@ -19,9 +19,9 @@ export const root = buildCommand({
   docs: {
     brief: "Example for live playground with boolean flag",
     customUsage: [
-      "--quiet",
-      "--quiet=yes",
-      "--noQuiet",
+      { input: "--quiet", brief: "Flag with no value" },
+      { input: "--quiet=yes", brief: "Flag with explicit value" },
+      { input: "--noQuiet", brief: "Negated flag" },
     ],
   },
 });

docs/docs/features/command-routing/commands.mdx

@@ -68,7 +68,7 @@ The parameters object is a specification of all of the parameters (arguments and
 
 A base level of documentation is required, and more is always appreciated. All commands must specify a value for `brief` that contains a short line of text to be used when referring to this command throughout the help text of the application.
 
-Optionally, you can further customize the help text for this specific command by including `fullDescription` or `customUsage`. The former will override `brief` in the command's help text and can contain multiple lines of text rather than just one. The `customUsage` property will replace the auto-generated usage lines, and is useful when there's some [additional validation of user inputs](../out-of-scope.mdx#cross-argument-validation) that isn't represented natively by Stricli.
+Optionally, you can further customize the help text for this specific command by including `fullDescription` or `customUsage`. The former will override `brief` in the command's help text and can contain multiple lines of text rather than just one. The `customUsage` property will replace the auto-generated usage lines, and is useful when there's some [additional validation of user inputs](../out-of-scope.mdx#cross-argument-validation) that isn't represented natively by Stricli. You can also provide an object with `input` and `brief` to print a description after the usage line.
 
 ```ts
 // output-next-line
@@ -84,6 +84,7 @@ buildCommand({
     customUsage: [
       "-a -b",
       "-c",
+      { input: "-d", brief: "Brief description of this use case" },
     ],
   },
   ...
@@ -98,6 +99,8 @@ run --help
 USAGE
   run -a -b
   run -c
+  run -d
+    Brief description of this use case
   run --help
 
 This is the full description of the command.

packages/core/tests/application.spec.ts

@@ -674,7 +674,11 @@ describe("Application", () => {
                     },
                     docs: {
                         brief: "basic command",
-                        customUsage: ["custom usage 1", { input: "custom-two", brief: "enhanced custom usage 2" }, "custom usage 3"],
+                        customUsage: [
+                            "custom usage 1",
+                            { input: "custom-two", brief: "enhanced custom usage 2" },
+                            "custom usage 3",
+                        ],
                     },
                 });
                 const appWithAlternateUsage = buildApplication(commandWithAlternateUsage, {