docs: fix doc_lazy_continuation across the workspace

Eighteen markdown list items in module- and item-doc comments had
continuation lines that were not indented to align under the item
text, so rustdoc rendered them as separate paragraphs and broke the
list. Corrected the indentation (and, at two sites where a general
wrap-up sentence followed a sublist, separated it with a blank doc
line so it does not mis-attach to the last item). Doc whitespace only;
no prose reworded, no code changed.

Workspace clippy is now warning-clean.

crates/ailang-codegen/src/intercepts.rs

@@ -8,14 +8,14 @@
 //!  - `expected_params`     — LLVM-IR param types as text
 //!  - `expected_ret`        — LLVM-IR return type as text
 //!  - `wants_alwaysinline`  — whether the dispatch site should
-//!                            attach the `alwaysinline` attribute
-//!                            to the emitted fn (was a separate
-//!                            hardcoded name-list in the predicate
-//!                            `intercept_emit_wants_alwaysinline`
-//!                            before raw-buf.1)
+//!    attach the `alwaysinline` attribute
+//!    to the emitted fn (was a separate
+//!    hardcoded name-list in the predicate
+//!    `intercept_emit_wants_alwaysinline`
+//!    before raw-buf.1)
 //!  - `emit`                — the per-arm IR-emission body, run
-//!                            against `&mut Emitter` after the
-//!                            sig check
+//!    against `&mut Emitter` after the
+//!    sig check
 //!
 //! Adding a new intercept = adding one row to `INTERCEPTS`. The
 //! dispatch site (`try_emit_primitive_instance_body` in