M2: terminal UI (ratatui)

- layout: header, top menu (quicklook, cpu, mem, swap, load), left sidebar,
  process list and alert footer
- decorations/colors, bars, per-plugin render implementations
- hotkeys: quit, help, modes, sorting, cursor, nice, kill, filters, toggles
- TestBackend layout test

crates/glances-tui/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+anyhow.workspace = true
 crossterm = "0.29.0"
 glances-core = { version = "0.1.0", path = "../glances-core" }
 glances-plugins = { version = "0.1.0", path = "../glances-plugins" }
@@ -11,3 +12,6 @@ indexmap.workspace = true
 ratatui = "0.30.2"
 serde_json.workspace = true
 tracing.workspace = true
+
+[dev-dependencies]
+clap = { workspace = true, features = ["derive"] }