Add baml.fs.read_dir, mkdir, baml.glob namespace, and fix parser string literal bug

baml_language/Cargo.toml

@@ -43,6 +43,7 @@ baml_compiler_parser = { path = "crates/baml_compiler_parser" }
 baml_compiler_syntax = { path = "crates/baml_compiler_syntax" }
 bex_project = { path = "crates/bex_project" }
 bex_engine = { path = "crates/bex_engine" }
+sys_glob = { path = "crates/sys_glob" }
 sys_llm = { path = "crates/sys_llm" }
 sys_ops = { path = "crates/sys_ops" }
 sys_types = { path = "crates/sys_types" }
@@ -151,6 +152,7 @@ salsa = { git = "https://github.com/salsa-rs/salsa.git", rev = "cdd0b85516a52c18
   "inventory",
 ] }
 serde = { version = "1.0.197", features = [ "derive" ] }
+serde-wasm-bindgen = "0.6"
 serde_json = { version = "1.0.113", features = [ "preserve_order" ] }
 similar = { version = "2.4.0", features = [ "inline" ] }
 smol_str = { version = "0.3" }

baml_language/crates/baml_builtins2/baml_std/baml/ns_fs/fs.baml

@@ -61,3 +61,22 @@ function write(path: string, content: string) -> int throws root.errors.Io {
 function write_bytes(path: string, content: uint8array) -> int throws root.errors.Io {
   $rust_io_function
 }
+
+class DirEntry {
+  name string
+  is_dir bool
+  is_file bool
+  is_symlink bool
+}
+
+class MkdirOptions {
+  recursive bool
+}
+
+function read_dir(path: string) -> DirEntry[] throws root.errors.Io {
+  $rust_io_function
+}
+
+function mkdir(path: string, options: MkdirOptions) -> null throws root.errors.Io {
+  $rust_io_function
+}

baml_language/crates/baml_builtins2/baml_std/baml/ns_glob/glob.baml

@@ -0,0 +1,24 @@
+class ScanOptions {
+  cwd string?
+  dot bool?
+  absolute bool?
+  follow_symlinks bool?
+  throw_error_on_broken_symlink bool?
+  only_files bool?
+}
+
+class Glob {
+  _handle $rust_type
+
+  function scan(self, root: string | ScanOptions) -> string[] throws root.errors.Io {
+    $rust_io_function
+  }
+
+  function matches(self, path: string) -> bool throws root.errors.Io {
+    $rust_io_function
+  }
+}
+
+function new(pattern: string) -> Glob throws root.errors.Io {
+  $rust_io_function
+}

baml_language/crates/baml_builtins2/src/lib.rs

@@ -90,6 +90,7 @@ pub const ALL: &[BuiltinFile] = &[
     builtin!("baml", "ns_math/math.baml"),
     builtin!("baml", "ns_sys/sys.baml"),
     builtin!("baml", "ns_fs/fs.baml"),
+    builtin!("baml", "ns_glob/glob.baml"),
     builtin!("baml", "ns_net/net.baml"),
     builtin!("baml", "ns_media/media.baml"),
     builtin!("baml", "ns_unstable/unstable.baml"),