remove treehouse-format crate and collapse everything into src

crates/treehouse/src/import_map.rs

@@ -1,48 +0,0 @@
-use std::ops::ControlFlow;
-
-use indexmap::IndexMap;
-use serde::{Deserialize, Serialize};
-use tracing::instrument;
-
-use crate::vfs::{self, Dir, VPathBuf};
-
-#[derive(Debug, Clone, Serialize)]
-pub struct ImportMap {
-    pub imports: IndexMap<String, String>,
-}
-
-#[derive(Debug, Clone, Deserialize, Serialize)]
-pub struct ImportRoot {
-    pub name: String,
-    pub path: VPathBuf,
-}
-
-impl ImportMap {
-    #[instrument(name = "ImportMap::generate", skip(import_roots))]
-    pub fn generate(site: &str, root: &dyn Dir, import_roots: &[ImportRoot]) -> Self {
-        let mut import_map = ImportMap {
-            imports: IndexMap::new(),
-        };
-
-        for import_root in import_roots {
-            vfs::walk_dir_rec(root, &import_root.path, &mut |path| {
-                if path.extension() == Some("js") {
-                    import_map.imports.insert(
-                        format!(
-                            "{}/{}",
-                            import_root.name,
-                            path.strip_prefix(&import_root.path).unwrap_or(path)
-                        ),
-                        vfs::url(site, root, path)
-                            .expect("import directory is not anchored anywhere"),
-                    );
-                }
-                ControlFlow::Continue(())
-            });
-        }
-
-        import_map.imports.sort_unstable_keys();
-
-        import_map
-    }
-}