Initialize Minecraft text generator project with basic structure and CLI functionality

crates/lib/src/error.rs

@@ -0,0 +1,13 @@
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum VoxelError {
+    #[error("coordinates ({x}, {y}, {z}) out of bounds")]
+    OutOfBounds { x: u32, y: u32, z: u32 },
+}
+
+#[derive(Debug, Error)]
+pub enum FontError {
+    #[error("failed to parse TTF font data: invalid format")]
+    InvalidTtf,
+}