feat(plugin): add has_rich property to detect rich availability

Fall back to plain-text output in cache CLI commands when the `rich`
package is not installed, instead of dumping raw unformatted markdown.

Author: d-biehl

packages/analyze/src/robotcode/analyze/cache/cli.py

@@ -156,7 +156,7 @@ def cache_info(app: Application, paths: Tuple[Path, ...]) -> None:
             )
 
         if app.config.output_format is None or app.config.output_format == OutputFormat.TEXT:
-            if app.colored:
+            if app.colored and app.has_rich:
                 lines = [
                     f"- **Directory:** {cache_dir}",
                     f"- **Database:** {db_path.name} ({_format_bytes(db_size)})",
@@ -252,7 +252,7 @@ def _matches(name: str) -> bool:
             return any(fnmatch(name, p) for p in patterns)
 
         if app.config.output_format is None or app.config.output_format == OutputFormat.TEXT:
-            if app.colored:
+            if app.colored and app.has_rich:
                 lines: list[str] = []
                 for section in target_sections:
                     entries = [e for e in db.list_entries(section) if _matches(e.entry_name)]

packages/plugin/src/robotcode/plugin/__init__.py

@@ -122,6 +122,15 @@ def colored(self) -> bool:
             ColoredOutput.YES,
         ]
 
+    @property
+    def has_rich(self) -> bool:
+        try:
+            import rich  # noqa: F401
+
+            return True
+        except ImportError:
+            return False
+
     def verbose(
         self,
         message: Union[str, Callable[[], Any], None],