add new and init to toolchain

TODO.md

@@ -626,8 +626,9 @@
   - typed allocation, allocator parameters, arenas/pools, build-mode heap policy, and escaping-allocation diagnostics remain deferred
 
 26. import from project "root" (implemented)
-  - imports beginning with `@` resolve from the compiler process cwd / project root
-  - `heap :: import "@std/mem/heap"` works from any package depth without `../../../` path math
+  - imports beginning with `@` resolve from the project root
+  - `brolang build [root]` uses `root` as the project root; without `root`, it searches cwd and parents for `build.bro`
+  - direct `brolang <package-dir> -o <out>` defaults the project root to the package dir; `--root <dir>` overrides it
 
 27. comptime integer value parameters (implemented; v1)
   - `$N` marks an integer comptime parameter in a normal `func` signature:
@@ -715,6 +716,8 @@
     `root/build.bro` (importing `@std/build`'s `BuildConfig`) and compiles the
     program package it names. The config is read from the checked HIR — build.bro
     is never lowered — so it is literal-only.
+  - `brolang new <project>` and `brolang init` create the default project layout
+    with local `std`, `ffi`, `vendor`, `source`, and `build.bro`
   - enabled `&<array literal>` (Zig's `&.{...}`): the literal is promoted to an
     anonymous global whose address decays to a slice, so list fields like
     `libraries = &["raylib"]` work; empty lists are `&[]`