chore: retire Roo Code integration — extension shut down (#3167) (#3212)

* chore: retire roo integration — extension shut down (#3167)

Remove the Roo Code integration after the extension was shut down: subpackage,
registry entry, catalog entry, docs, tests, and issue-template options.

Assisted-by: GitHub Copilot (model: Claude Opus 4.8, autonomous)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs: remove stale Roo Code mention in upgrade guide

Assisted-by: GitHub Copilot (model: gpt-5.3-codex, autonomous)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* chore: remove leftover Roo Code references after merge

Drop roo from presets/ARCHITECTURE.md example and the agent-context
defaults map; these came in from main and were flagged by review.

Assisted-by: GitHub Copilot (model: claude-opus-4.8, autonomous)

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/specify_cli/integrations/__init__.py

@@ -74,7 +74,6 @@ def _register_builtins() -> None:
     from .pi import PiIntegration
     from .qodercli import QodercliIntegration
     from .qwen import QwenIntegration
-    from .roo import RooIntegration
     from .rovodev import RovodevIntegration
     from .shai import ShaiIntegration
     from .tabnine import TabnineIntegration
@@ -111,7 +110,6 @@ def _register_builtins() -> None:
     _register(PiIntegration())
     _register(QodercliIntegration())
     _register(QwenIntegration())
-    _register(RooIntegration())
     _register(RovodevIntegration())
     _register(ShaiIntegration())
     _register(TabnineIntegration())

src/specify_cli/integrations/roo/__init__.py

@@ -1,21 +0,0 @@
-"""Roo Code integration."""
-
-from ..base import MarkdownIntegration
-
-
-class RooIntegration(MarkdownIntegration):
-    key = "roo"
-    config = {
-        "name": "Roo Code",
-        "folder": ".roo/",
-        "commands_subdir": "commands",
-        "install_url": None,
-        "requires_cli": False,
-    }
-    registrar_config = {
-        "dir": ".roo/commands",
-        "format": "markdown",
-        "args": "$ARGUMENTS",
-        "extension": ".md",
-    }
-    multi_install_safe = True