feat(modules/opnsense): refactor and add upgrade functionality

Refactor OPNSense module to use a mod.rs structure and add an OPNsenseLaunchUpgrade score for launching firmware upgrades.

examples/nanodc/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "example-nanodc"
+edition = "2024"
+version.workspace = true
+readme.workspace = true
+license.workspace = true
+publish = false
+
+[dependencies]
+harmony = { path = "../../harmony" }
+harmony_tui = { path = "../../harmony_tui" }
+harmony_types = { path = "../../harmony_types" }
+cidr = { workspace = true }
+tokio = { workspace = true }
+harmony_macros = { path = "../../harmony_macros" }
+log = { workspace = true }
+env_logger = { workspace = true }
+url = { workspace = true }