const, if as a value, """ text over several lines, min/max/abs/clamp, import a/b and import x as y, the fs module

- const NAME = value (numbers, text, other constants; typed: const f32 G = 9.8), also module.NAME
- x := if c { a } else { b }
- """ ... """: the closing quotes' indentation goes from every line
- min, max, abs, clamp for any numbers, unless your own function has the name
- import ui/button (a module in a folder), import path as p
- fs: read_bytes, write_bytes, exists, is_dir, mkdir (with parents), list, remove_dir, data_dir(app)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016GzNP6r8dg6WDxUVZy8wjL

tests/new/std_fs.fch

@@ -0,0 +1,23 @@
+// the fs module: bytes with NUL in them, folders, listing
+import fs
+
+fn main() -> ! {
+    root := "fs_test_dir"
+    try fs.mkdir(root + "/a/b")
+    print(fs.exists(root), fs.is_dir(root + "/a/b"), fs.is_dir("nope"))
+    data := [u8(0), u8(255), u8(13), u8(10), u8(65)]
+    try fs.write_bytes(root + "/a/blob.bin", data)
+    back := try fs.read_bytes(root + "/a/blob.bin")
+    print(back.len, back[0], back[1], back[4], str(back) == str(data))
+    write_file(root + "/z.txt", "z")
+    print(try fs.list(root))
+    print(try fs.list(root + "/a"))
+    print(fs.list("no_such_dir") or ["(none)"])
+    delete_file(root + "/a/blob.bin")
+    delete_file(root + "/z.txt")
+    try fs.remove_dir(root + "/a/b")
+    try fs.remove_dir(root + "/a")
+    try fs.remove_dir(root)
+    print(fs.exists(root))
+    fs.remove_dir(root) or { print("gone:", err) }
+}