feat: add base crates

examples/service/char_plan/Cargo.toml

@@ -1,8 +1,9 @@
 [package]
-name = "char"
+name = "char_plan"
 version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+char = { path = "../../../crates/char" }