refactor: project structure (#9)

Split up project into multiple crates and use a Cargo workspace.

crates/asterctl/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "asterctl"
+version = "0.1.0"
+description = "AOOSTAR WTR MAX Screen Control tool"
+readme = "../../README.md"
+
+rust-version.workspace = true
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+asterctl-lcd = { path = "../asterctl-lcd", version = "0.1.0" }
+
+anyhow = "1.0.98"
+clap = { version = "4.5.42", features = ["derive"] }
+image = "0.25.6"
+imageproc = { version = "0.25.0", default-features = false }
+ab_glyph = { version = "0.2.31", default-features = false, features = ["std"] }
+log = "0.4.27"
+env_logger = "0.11.8"
+notify = "8.2.0"
+serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0.142"
+serde_repr = "0.1.20"
+once_cell = "1.21.3"
+
+[dev-dependencies]
+rstest = "0.26"