Add deprecated feature and migrate string_proc to just_fmt

- Add `deprecated` feature flag to Cargo.toml
- Gate `string_proc` module behind both `deprecated` and `string_proc`
  features
- Replace internal `string_proc` dependency with `just_fmt` crate in
  constants macros
- Mark all `string_proc` modules as deprecated with migration
  instructions
- Remove `string_proc` dependency from sheet system

4 files changed, 3 insertions, 5 deletions

diff --git a/systems/_asset/src/asset.rs b/systems/_asset/src/asset.rs
index a3b1c6a..cdcae3c 100644
--- a/systems/_asset/src/asset.rs
+++ b/systems/_asset/src/asset.rs
@@ -384,7 +384,7 @@ async fn check_handle_is_cross_directory(
 
 fn check_path(file_name: &OsStr) -> Result<Cow<'_, str>, PrecheckFailed> {
     let file_name_str = file_name.to_string_lossy();
-    
+
     // When operating on a TEMP_FILE or LOCK_FILE,
     // names like `~~foo.txt` or `.tmp_.tmp_foo.txt` would be generated
     // This is not expected and should result in an error
diff --git a/systems/_constants/macros/Cargo.toml b/systems/_constants/macros/Cargo.toml
index 2aec6bc..1b1012b 100644
--- a/systems/_constants/macros/Cargo.toml
+++ b/systems/_constants/macros/Cargo.toml
@@ -11,5 +11,4 @@ syn = { version = "2.0", features = ["full", "extra-traits"] }
 quote = "1.0"
 proc-macro2 = "1.0"
 regex = "1.12"
-
-string_proc = { path = "../../../utils/string_proc" }
+just_fmt = "0.1"
diff --git a/systems/_constants/macros/src/lib.rs b/systems/_constants/macros/src/lib.rs
index f6cf945..2d3f255 100644
--- a/systems/_constants/macros/src/lib.rs
+++ b/systems/_constants/macros/src/lib.rs
@@ -1,6 +1,6 @@
+use just_fmt::pascal_case;
 use proc_macro::TokenStream;
 use quote::quote;
-use string_proc::pascal_case;
 use syn::{Expr, ExprLit, Ident, Item, ItemMod, Lit, LitStr, parse_macro_input};
 
 #[proc_macro_attribute]
diff --git a/systems/sheet/Cargo.toml b/systems/sheet/Cargo.toml
index 5c53c36..99cc7c7 100644
--- a/systems/sheet/Cargo.toml
+++ b/systems/sheet/Cargo.toml
@@ -5,5 +5,4 @@ version.workspace = true
 
 [dependencies]
 sheet_system_macros = { path = "macros" }
-string_proc = { path = "../../utils/string_proc" }
 asset_system = { path = "../_asset" }