composer-require-checker: add page (#5236)

pages/common/composer-require-checker.md

@@ -0,0 +1,12 @@
+# composer-require-checker
+
+> A CLI tool to analyse Composer dependencies for soft dependencies.
+> More information: <https://github.com/maglnet/ComposerRequireChecker>.
+
+- Analyse a Composer JSON file:
+
+`composer-require-checker check {{path/to/composer.json}}`
+
+- Analyse a Composer JSON file with a specific configuration:
+
+`composer-require-checker check --config-file {{path/to/config.json}} {{path/to/composer.json}}`