pw-container: add page

pages/linux/pw-container.md

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+# pw-container
+
+> Run a program in a new security context.
+> More information: <https://docs.pipewire.org/page_man_pw-container_1.html>.
+
+- Create a new security context and print its socket address to `stdout`:
+
+`pw-container`
+
+- Run a specific program within a new security context:
+
+`pw-container {{command}} {{argument1 argument2 ...}}`
+
+- Run a program, connecting to a specific remote PipeWire instance:
+
+`pw-container {{[-r|--remote]}} {{remote_instance_name}} {{command}}`
+
+- Run a program in a new context with specific properties using a JSON object:
+
+`pw-container {{[-P|--properties]}} '{{{"key": "value"}}}' {{command}}`
+
+- Display help:
+
+`pw-container {{[-h|--help]}}`