Rename rbos → redbear everywhere, add redbear-info system tool

Replace all 'rbos'/'RBOS' references with 'redbear'/'Red Bear OS'
across the build system, scripts, docs, and configs. Renamed files:
  rbos.ipxe → redbear.ipxe
  assets/rbos-icon.png → assets/redbear-icon.png
  recipes/system/rbos-info → recipes/system/redbear-info

Added redbear-info: a system tool that enumerates all Red Bear OS
custom components, checks runtime availability via scheme paths and
binary presence, and prints status/test info. Supports --verbose,
--json, and --test output modes. Zero external dependencies.

local/recipes/system/redbear-meta/recipe.toml

@@ -43,10 +43,7 @@ README
 # will ensure all of these are built and staged before this package
 dependencies = [
     "redbear-release",
-    "redox-driver-sys",
-    "linux-kpi",
     "firmware-loader",
-    "redox-drm",
     "evdevd",
     "udev-shim",
 ]