refactor(viewer): rename app to "mm" and improve navigation features

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "hello"
+name = "mm"
 version = "0.1.0"
 edition = "2024"
 license = "MIT"
@@ -9,7 +9,7 @@ license = "MIT"
 [dependencies]
 clap = { version = "4.5", features = ["derive"] }
 clap_complete = "4.5"
-error-stack = "0.5"
+error-stack = "0.6"
 thiserror = "2.0"
 tokio = "1.43.1"
 tracing = "0.1"
@@ -19,3 +19,4 @@ nalgebra = "0.34.1"
 wayland-sys = { version = "0.31.7", default-features = false }
 wayland-backend = { version = "0.3.11", default-features = false }
 ignore = { version = "0.4.23", features = ["simd-accel"] }
+unicode-segmentation = "1.12.0"