xcrun: add page (#6618)

pages/osx/xcrun.md

@@ -0,0 +1,28 @@
+# xcrun
+
+> Run or locate development tools and properties.
+> More information: <https://www.unix.com/man-page/osx/1/xcrun/>.
+
+- Find and run a tool from the active developer directory:
+
+`xcrun {{tool}} {{arguments}}`
+
+- Show verbose output:
+
+`xcrun {{tool}} {{arguments}} --verbose`
+
+- Find a tool for a given SDK:
+
+`xcrun --sdk {{sdk_name}}`
+
+- Find a tool for a given toolchain:
+
+`xcrun --toolchain {{name}}`
+
+- Display help:
+
+`xcrun --help`
+
+- Display version:
+
+`xcrun --version`