feat(core): rename `builds` feature to `build`

Replace the `builds` feature with `build` across the crate, keeping
a backward-compatible alias for the old name.  Update all internal
visibility from `#[doc(hidden)] pub mod` to `pub(crate) mod` and
reorganize the `__private` module into a dedicated `private.rs`.

1 files changed, 1 insertions, 1 deletions

diff --git a/mingling_cli/Cargo.toml b/mingling_cli/Cargo.toml
index 906cdd0..330ef5a 100644
--- a/mingling_cli/Cargo.toml
+++ b/mingling_cli/Cargo.toml
@@ -31,7 +31,7 @@ features = [
 [build-dependencies.mingling]
 path = "../mingling"
 features = [
-    "builds",
+    "build",
     "pathf",
 ]