feat: build pgvecto.rs from source (v0.1.14-beta)

Relates to NixOS/nixpkgs#274509

packages/pgvecto-rs/0001-read-clang-flags-from-environment.diff

@@ -0,0 +1,17 @@
+diff --git a/crates/c/build.rs b/crates/c/build.rs
+index 8d822e5..8b7e371 100644
+--- a/crates/c/build.rs
++++ b/crates/c/build.rs
+@@ -1,9 +1,12 @@
+ fn main() {
+     println!("cargo:rerun-if-changed=src/c.h");
+     println!("cargo:rerun-if-changed=src/c.c");
++    println!("cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS");
+     cc::Build::new()
+         .compiler("clang-16")
+         .file("./src/c.c")
++        .try_flags_from_environment("BINDGEN_EXTRA_CLANG_ARGS")
++        .expect("the BINDGEN_EXTRA_CLANG_ARGS environment variable must be specified and UTF-8")
+         .opt_level(3)
+         .debug(true)
+         .compile("pgvectorsc");

packages/pgvecto-rs/0002-enable-feature-result-option-inspect.diff

@@ -0,0 +1,13 @@
+diff --git a/src/lib.rs b/src/lib.rs
+index fc99a94..efcaa19 100644
+--- a/src/lib.rs
++++ b/src/lib.rs
+@@ -3,6 +3,8 @@
+ //! Provides an easy-to-use extension for vector similarity search.
+ #![feature(never_type)]
+ #![feature(alloc_error_hook)]
++#![feature(result_option_inspect)]
++#![feature(const_maybe_uninit_zeroed)]
+
+ mod bgworker;
+ mod datatype;