pkg: add page (#7432)

pages/android/pkg.md

@@ -0,0 +1,24 @@
+# pkg
+
+> Package management utility for Termux.
+> More information: <https://wiki.termux.com/wiki/Package_Management>.
+
+- Upgrade all installed packages:
+
+`pkg upgrade`
+
+- Install a package:
+
+`pkg install {{package}}`
+
+- Uninstall a package:
+
+`pkg uninstall {{package}}`
+
+- Reinstall a package:
+
+`pkg reinstall {{package}}`
+
+- Search for a package:
+
+`pkg search {{package}}`