brew: update page; brew-*: add page; brew-cask: remove page (#11376)

pages/common/brew-install.md

@@ -0,0 +1,16 @@
+# brew install
+
+> Install a Homebrew formula or cask.
+> More information: <https://docs.brew.sh/Manpage#install-options-formulacask->.
+
+- Install a formula/cask:
+
+`brew install {{formula|cask}}`
+
+- Build and install a formula from source (dependencies will still be installed from bottles):
+
+`brew install --build-from-source {{formula}}`
+
+- Download the manifest, print what would be installed but don't actually install anything:
+
+`brew install --dry-run {{formula|cask}}`