Move crates under a sub folder to clean up the code

crates/milli/examples/settings.rs

@@ -0,0 +1,33 @@
+// use big_s::S;
+use heed::EnvOpenOptions;
+// use maplit::hashset;
+use milli::{
+    update::{IndexerConfig, Settings},
+    Criterion, Index,
+};
+
+fn main() {
+    let mut options = EnvOpenOptions::new();
+    options.map_size(100 * 1024 * 1024 * 1024); // 100 GB
+
+    let index = Index::new(options, "data_movies.ms").unwrap();
+    let mut wtxn = index.write_txn().unwrap();
+
+    let config = IndexerConfig::default();
+    let mut builder = Settings::new(&mut wtxn, &index, &config);
+
+    // builder.set_min_word_len_one_typo(5);
+    // builder.set_min_word_len_two_typos(7);
+    // builder.set_sortable_fields(hashset! { S("release_date") });
+    builder.set_criteria(vec![
+        Criterion::Words,
+        Criterion::Typo,
+        Criterion::Proximity,
+        Criterion::Attribute,
+        Criterion::Sort,
+        Criterion::Exactness,
+    ]);
+
+    builder.execute(|_| (), || false).unwrap();
+    wtxn.commit().unwrap();
+}