bpkg: add page (#12475)

* bpkg: add page

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Fazle Arefin <fazlearefin@users.noreply.github.com>

pages/common/bpkg.md

@@ -0,0 +1,28 @@
+# bpkg
+
+> A package manager for Bash scripts.
+> More information: <https://github.com/bpkg/bpkg>.
+
+- Update the local index:
+
+`bpkg update`
+
+- Install a package globally:
+
+`bpkg install --global {{package}}`
+
+- Install a package in a subdirectory of the current directory:
+
+`bpkg install {{package}}`
+
+- Install a specific version of a package globally:
+
+`bpkg install {{package}}@{{version}} -g`
+
+- Show details about a specific package:
+
+`bpkg show {{package}}`
+
+- Run a command, optionally specifying its arguments:
+
+`bpkg run {{command}} {{argument1 argument2 ...}}`