feat(tui): implement SomaFM terminal radio player

somafm_tui/widgets/search.py

@@ -0,0 +1,14 @@
+"""Filter input (hidden until you press /)."""
+
+from __future__ import annotations
+
+from textual.widgets import Input
+
+
+class SearchInput(Input):
+    def __init__(self) -> None:
+        super().__init__(
+            placeholder="filter stations…  (enter tune · esc close)",
+            id="search",
+            disabled=True,
+        )