feat: lints feature skeleton

Author: epage

src/cargo/core/features.rs

@@ -483,6 +483,9 @@ features! {
 
     // Allow specifying rustflags directly in a profile
     (stable, workspace_inheritance, "1.64", "reference/unstable.html#workspace-inheritance"),
+
+    // Allow specifying rustflags directly in a profile
+    (unstable, lints, "", "reference/unstable.html#lints"),
 }
 
 pub struct Feature {

src/doc/src/reference/unstable.md

@@ -93,6 +93,7 @@ Each new feature described below should explain how to use it.
     * [codegen-backend](#codegen-backend) --- Select the codegen backend used by rustc.
     * [per-package-target](#per-package-target) --- Sets the `--target` to use for each individual package.
     * [artifact dependencies](#artifact-dependencies) --- Allow build artifacts to be included into other build artifacts and build them for different targets.
+    * [`[lints]`](#lints) --- Configure lint levels for various linter tools
 * Information and metadata
     * [Build-plan](#build-plan) --- Emits JSON information on which commands will be run.
     * [unit-graph](#unit-graph) --- Emits JSON for Cargo's internal graph structure.
@@ -1391,6 +1392,10 @@ Valid operations are the following:
 * When the unstable feature is on, fetching/cloning a git repository is always a shallow fetch. This roughly equals to `git fetch --depth 1` everywhere.
 * Even with the presence of `Cargo.lock` or specifying a commit `{ rev = "…" }`, gitoxide is still smart enough to shallow fetch without unshallowing the existing repository.
 
+### `[lints]`
+
+* Tracking Issue: [#12115](https://github.com/rust-lang/cargo/issues/12115)
+
 ## Stabilized and removed features
 
 ### Compile progress