openbsd: add directory; openbsd/pkg_{add,info,delete}: add page (#10698)

* openbsd: add directory; openbsd/pkg_{add,info,delete}: add page (#10698) 

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Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/openbsd/pkg.md

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+# pkg
+
+> OpenBSD package manager utility.
+> More information: <https://www.openbsd.org/faq/faq15.html>.
+
+- View documentation for installing/updating packages:
+
+`tldr pkg_add`
+
+- View documentation for removing packages:
+
+`tldr pkg_delete`
+
+- View documentation for viewing information about packages:
+
+`tldr pkg_info`

pages/openbsd/pkg_add.md

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+# pkg_add
+
+> Install/update packages in OpenBSD.
+> See also: `pkg_info`, `pkg_delete`.
+> More information: <https://man.openbsd.org/pkg_add>.
+
+- Update all packages, including dependencies:
+
+`pkg_add -u`
+
+- Install a new package:
+
+`pkg_add {{package}}`
+
+- Install packages from the raw output of `pkg_info`:
+
+`pkg_add -l {{path/to/file}}`

pages/openbsd/pkg_delete.md

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+# pkg_delete
+
+> Remove packages in OpenBSD.
+> See also: `pkg_add`, `pkg_info`.
+> More information: <https://man.openbsd.org/pkg_delete>.
+
+- Delete a package:
+
+`pkg_delete {{package}}`
+
+- Delete a package, including its unused dependencies:
+
+`pkg_delete -a {{package}}`
+
+- Dry-run deletion of a package:
+
+`pkg_delete -n {{package}}`

pages/openbsd/pkg_info.md

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+# pkg_info
+
+> View information about packages in OpenBSD.
+> See also: `pkg_add`, `pkg_delete`.
+> More information: <https://man.openbsd.org/pkg_info>.
+
+- Search for a package using the package name:
+
+`pkg_info -Q {{package}}`
+
+- Output a list of installed packages for use with `pkg_add -l`:
+
+`pkg_info -mz`