dsh-plugin-archive-manager: Adds session archive management to dsh Web UI

# Introduction dsh sessions can be archived, but there are few built-in entry points for handling post-archiving tasks. Whether you want to retrieve a specific old session, perform a bulk restore, or automatically archive inactive sessions based on rules, there is currently a lack of a visual interface for these operations. The dsh-plugin-archive-manager introduced below is designed to solve this problem by incorporating these capabilities into the dsh Web UI settings page. # What is it? dsh-plugin-archive-manager is a dsh plugin maintained by qinyre, released under the MIT license, with the current version being 0.3.0. It provides a top-level section titled "Archive Management" in the Web UI settings page, covering three functions: browsing archived sessions, unarchiving, and automatic archiving based on rules. It pre...