[julian-goldstein]

Summary

Follow-up to #38 on the build output.

• Commands hidden by default, make V=1 echoes each one under its status line. The QUIET=1 switch from template: build with the yeet CLI's toolchain; cargo-style output #38 is gone.
• The Bundling line names the output and its size, as esbuild's own summary used to before it was silenced:

   Toolchain yeet v0.10.1 (/home/me/.local/share/yeet/toolchain/linux/x86_64/v0.10.1)
  Generating src/bpf/include/vmlinux.h
   Compiling cpusched.bpf.c
   Compiling runqlat.bpf.c
     Linking bin/probe.bpf.o
    Bundling src/main.jsx -> dist/index.jsx (15.5kb)
    Finished build in 0.66s

Test plan

• Fresh scaffold: default build shows status lines only, with the bundle line carrying the output path and size.
• make V=1 echoes the commands under the status lines.