Fix some broken links in the docs (#8394)

* fix some broken links

* remove duplicate and confusing material from cli.md

* Switch brazil to the 2 letter country code

* Update docs/_langs.md

Co-Authored-By: Ryan <fauxpark@gmail.com>

Co-authored-by: Ryan <fauxpark@gmail.com>

docs/index.html

@@ -33,6 +33,7 @@
         // Moved pages
         '/adding_a_keyboard_to_qmk': '/hardware_keyboard_guidelines',
         '/build_environment_setup': '/getting_started_build_tools',
+        '/cli_dev_configuration': '/cli_configuration',
         '/dynamic_macros': '/feature_dynamic_macros',
         '/feature_common_shortcuts': '/feature_advanced_keycodes',
         '/glossary': '/reference_glossary',