Enable clippy, suppress lots, fix a couple. (#703)

This enables clippy in CI and suppresses most of the existing
warnings. We can drill down and fix those later, but this will
help start getting things under control.

cocoa-foundation/Cargo.toml

@@ -12,6 +12,9 @@ rust-version.workspace = true
 [package.metadata.docs.rs]
 default-target = "x86_64-apple-darwin"
 
+[lints]
+workspace = true
+
 [dependencies]
 core-foundation.workspace = true
 core-graphics-types.workspace = true

cocoa-foundation/src/foundation.rs

@@ -26,7 +26,7 @@ pub type NSInteger = core::ffi::c_long;
 #[cfg(target_pointer_width = "64")]
 pub type NSUInteger = core::ffi::c_ulong;
 
-pub const NSIntegerMax: NSInteger = NSInteger::max_value();
+pub const NSIntegerMax: NSInteger = NSInteger::MAX;
 pub const NSNotFound: NSInteger = NSIntegerMax;
 
 const UTF8_ENCODING: usize = 4;