feat(tui): scroll long result names and page through results

Closes #55.

While [2] Results is focused the Info pane describes the highlighted
result, so a truncated path can be read in full. h/l (or the arrow keys)
scroll the filename column by display cells, 0 and $ jump to either end
of the highlighted name, and Home/End, g/G, PgUp/PgDn and Ctrl-f/b/d/u
move through the list; the same keys work while a filter is being typed.

Ctrl chords are no longer read as their bare letter: outside [2] they do
nothing, where before Ctrl-d deleted a search and Ctrl-c opened rooms.
Space after a filter that matches nothing no longer indexes an empty
list.

soulseek-rs/Cargo.toml

@@ -30,6 +30,7 @@ soulseek-rs-lib = { version = "14.1.2", path = "../soulseek-rs-lib" }
 clap = { version = "4.6.2", features = ["derive", "color", "wrap_help", "env"] }
 clap_complete = "4.6.7"
 ratatui = "0.30.2"
+unicode-truncate = "2"
 color-eyre = "0.6.5"
 dotenv = "0.15.0"
 igd-next = "0.17"