refactor!: replace build.rs with compile-time macro build steps

BREAKING CHANGE: Replace the `build`/`builds` feature system with
compile-time macro-driven generation. `gen_program!()` now automatically
invokes `build_comp!()` and `build_pathf!()` when the `comp`/`pathf`
features are enabled, eliminating the need for `build.rs` and
`[build-dependencies]` blocks.

This removes the `build` feature, the `mingling::build` module, and all
related build-time API functions. Completion scripts are now written to
`{target_directory}/mingling/` instead of `target/release/`. The
`mingling_cli` uses `build_comp!("mling")` for its custom binary name.

1 files changed, 4 insertions, 0 deletions

diff --git a/mingling/src/lib.rs b/mingling/src/lib.rs
index 55240e5..45c8ec3 100644
--- a/mingling/src/lib.rs
+++ b/mingling/src/lib.rs
@@ -64,6 +64,10 @@ pub mod macros {
     #[cfg(feature = "picker")]
     pub use arg_picker::macros::*;
     pub use mingling_macros::buffer;
+    #[cfg(feature = "comp")]
+    pub use mingling_macros::build_comp;
+    #[cfg(feature = "pathf")]
+    pub use mingling_macros::build_pathf;
     pub use mingling_macros::chain;
     #[cfg(feature = "extras")]
     pub use mingling_macros::command;