feat: improve remote browser tree routing

- Allow remote host aliases passed via --browser to fan out for read-only
  multi-browser SDK paths while preserving strict routing for mutating commands.
- Add remote host grouping and scoped profile labels to tabs tree output so
  global views avoid repeated host prefixes.
- Carry browser family metadata through remote targets, tabs, and groups and
  style tree browser labels by family.
- Split CLI rendering helpers into a typed rendering package with dedicated
  common, label, tabs-tree, and windows-tree modules.
- Bump browser-cli and extension versions to 0.15.5.
- Cover the new routing and rendering behavior with unit and CLI tests.

browser_cli/models.py

@@ -46,6 +46,8 @@ class Tab:
   group_id: int | None = None
   index: int = 0
   browser: str | None = None
+  browser_name: str | None = None
+  browser_group: str | None = None
   _browser: BoundBrowser | None = field(default=None, repr=False, compare=False, init=False)
 
   def _b(self) -> BoundBrowser:
@@ -152,6 +154,8 @@ class Group:
   tab_count: int
   window_id: int | None = None
   browser: str | None = None
+  browser_name: str | None = None
+  browser_group: str | None = None
   _browser: BoundBrowser | None = field(default=None, repr=False, compare=False, init=False)
 
   def _b(self) -> BoundBrowser: