feat(bootstrapping): add bootstrap load balancer and DHCP configurations

- Introduce `bootstrap_load_balancer` module for handling initial load balancing configuration.
- Add `bootstrap_dhcp` module for bootstrapping DHCP settings.
- Create `harmony_types` crate to house shared types, including `MacAddress`.
- Update `harmony_macros` to use `harmony_types` instead of directly referencing `harmony`.

harmony-rs/harmony_types/Cargo.toml

@@ -0,0 +1,4 @@
+[package]
+name = "harmony_types"
+edition = "2024"
+version = "1.0.0"

harmony-rs/harmony_types/src/lib.rs

@@ -0,0 +1,26 @@
+pub mod net {
+    #[derive(Clone, Debug, PartialEq, Eq, Hash)]
+    pub struct MacAddress(pub [u8; 6]);
+
+    impl MacAddress {
+        #[cfg(test)]
+        pub fn dummy() -> Self {
+            Self([0, 0, 0, 0, 0, 0])
+        }
+    }
+
+    impl From<&MacAddress> for String {
+        fn from(value: &MacAddress) -> Self {
+            format!(
+                "{:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}",
+                value.0[0], value.0[1], value.0[2], value.0[3], value.0[4], value.0[5]
+            )
+        }
+    }
+
+    impl std::fmt::Display for MacAddress {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            f.write_fmt(format_args!("MacAddress {}", String::from(self)))
+        }
+    }
+}