Add search --cert-dir, --creds

When we searching any image at a container registry,
--cert-dir and --creds could be required
as well as push, pull, etc.

Signed-off-by: Toshiki Sonoda <sonoda.toshiki@fujitsu.com>

docs/source/markdown/options/cert-dir.md

@@ -1,5 +1,5 @@
 ####> This option file is used in:
-####>   podman build, container runlabel, image sign, kube play, login, manifest add, manifest push, pull, push
+####>   podman build, container runlabel, image sign, kube play, login, manifest add, manifest push, pull, push, search
 ####> If file is edited, make sure the changes
 ####> are applicable to all of those.
 #### **--cert-dir**=*path*

docs/source/markdown/options/creds.md

@@ -1,5 +1,5 @@
 ####> This option file is used in:
-####>   podman build, container runlabel, kube play, manifest add, manifest push, pull, push
+####>   podman build, container runlabel, kube play, manifest add, manifest push, pull, push, search
 ####> If file is edited, make sure the changes
 ####> are applicable to all of those.
 #### **--creds**=*[username[:password]]*

docs/source/markdown/podman-search.1.md.in

@@ -32,11 +32,15 @@ Further note that searching without a search term will only work for registries
 
 @@option authfile
 
+@@option cert-dir
+
 #### **--compatible**
 
 After the name and the description, also show the stars, official and automated descriptors as Docker does.
 Podman does not show these descriptors by default since they are not supported by most public container registries.
 
+@@option creds
+
 #### **--filter**, **-f**=*filter*
 
 Filter output based on conditions provided (default [])