Add Ori as a lazy-loaded agent and a default-agent choice (#7709)

Ori is OpenRouter's harness: `ori claude`, `ori codex` and `ori opencode` start those agents against OpenRouter's model catalogue, and `ori code` is Ori's own agent. That last one is what the default-agent entry launches, bare — Ori has no approval prompt to skip, so there is no "don't stop to ask" flag to pass it the way the other agents get one.

The package is `github:OpenRouterLabs/ori-releases`, because upstream ships prebuilt binaries as release assets and publishes nothing to npm. mise's `github` backend picks the right asset per platform and verifies GitHub's artifact attestations on the way in; `ubi` resolves the same release but is deprecated for removal in mise 2027.1.

The menu glyph at U+E909 is OpenRouter's own mark. Ori publishes no logo of its own and its product page renders that one, so there was no Ori-specific mark to prefer over it.

Co-authored-by: Codex XHigh <noreply@openai.com>

bin/omarchy-remove-preinstalls

@@ -15,7 +15,7 @@ if gum confirm "Are you sure you want to remove all preinstalled web apps, TUI w
   # Remove mise stubs
   rm -f ~/.local/bin/codex ~/.local/bin/claude ~/.local/bin/agy ~/.local/bin/copilot \
        ~/.local/bin/gh ~/.local/bin/opencode ~/.local/bin/playwright ~/.local/bin/playwright-cli ~/.local/bin/pi \
-       ~/.local/bin/omp ~/.local/bin/grok ~/.local/bin/crush ~/.local/bin/ghui ~/.local/bin/hunk
+       ~/.local/bin/omp ~/.local/bin/ori ~/.local/bin/grok ~/.local/bin/crush ~/.local/bin/ghui ~/.local/bin/hunk
 
   omarchy-pkg-drop \
     aether \