fix(console): count a virama conjunct as one cell

A Hindi conjunct such as न्द in हिन्दी drew the --list border one cell short.

tests/core/test_console_cell_width.py

@@ -22,3 +22,8 @@ def test_panel_pads_an_indic_label_to_the_border() -> None:
     Console(file=out, width=20, color_system=None).print(Panel("हिंदी"))
 
     assert out.getvalue().splitlines()[1] == "│ हिंदी" + " " * 12 + " │"
+
+
+def test_a_virama_conjunct_shares_one_cell() -> None:
+    assert cell_len("हिन्दी") == 4  # न्द is one conjunct
+    assert cell_len("ಕನ್ನಡ") == 4  # a Kannada virama does not join, so ನ್ನ keeps two cells