dsh-reasoning-effort: Configuring Reasoning Effort for DeepSeek Harness Models

DeepSeek Harness (DSH) has introduced the `dsh-reasoning-effort` plugin, designed to address the unintuitive nature of manually configuring reasoning effort (such as `reasoning_effort`) by providing a visual interface. The plugin supports automatic Provider discovery, offers a seven-level setting range (from off to max) with a purple glow effect, and includes features such as non-destructive updates and state protection. Users can perform custom mappings or exclusions via a Cordis patch. The installation command is `dsh plugin --profile web add -w dsh-reasoning-effort`. The plugin does not add new credentials or requests; it only enhances the settings contract.