Muse Glimmer llama.cpp Makefile for macOS

# Muse Glimmer 30B on llama.cpp (macOS)

Convenience `Makefile` for downloading and serving **Meta Muse Glimmer 30B** with
[llama.cpp](https://github.com/ggml-org/llama.cpp) on Apple Silicon.

Setup follows
[Run Muse Glimmer-30B Locally with llama.cpp on macOS](https://scriptable.com/posts/llama-cpp/run-muse-glimmer-llama-cpp-macos/),
which is the reference for the build flags, the three GGUFs, and the server
invocation wrapped up here. Read it first if you want the reasoning behind any
of the settings; this repo just automates them.

## llama.cpp lives in a separate folder

This repo contains **no llama.cpp source and no build tree** — only the
`Makefile`. The upstream clone is a sibling directory, which keeps these local
targets out of a tree you'll be pulling and rebuilding:

```
~/projects/llama-cpp/
├── llama.cpp/                  <- upstream clone (source + build/)
└── llama-cpp-muse-glimmer/     <- this repo (Makefile only)
```

The clone's location is the `LLAMA_CPP` variable at the top of the `Makefile`,
and everything else derives from it:

```make
LLAMA_CPP ?= $(HOME)/projects/llama-cpp/llama.cpp
BUILD_DIR ?= $(LLAMA_CPP)/build

SERVER ?= $(BUILD_DIR)/bin/llama-server
CLI    ?= $(BUILD_DIR)/bin/llama-cli
LLAMA  ?= $(BUILD_DIR)/bin/llama
```

**Point `LLAMA_CPP` at your own clone** — edit that line, or override it per
invocation:

```sh
make build LLAMA_CPP=~/src/llama.cpp
```

`make build` passes the source directory explicitly (`cmake -S $(LLAMA_CPP) -B
$(BUILD_DIR)`), so nothing is built relative to the current directory.

## You need a recent llama.cpp build

Muse Glimmer is a new architecture, so an older llama.cpp **cannot load the
model at all** — it fails on the unknown arch rather than doing anything
graceful.

- **Build `b10353` or newer** is required. The article notes Homebrew's formula
  was still on `b10330`, so `brew install llama.cpp` is not sufficient — build
  from source.
- **An existing clone needs updating.** If you cloned llama.cpp before Muse
  Glimmer landed, `make build` compiles a tree that can't load the model. Pull
  first:

  ```sh
  git -C ~/projects/llama-cpp/llama.cpp pull
  ```

- **`make build` verifies this for you.** It depends on `check-arch`, which
  greps `$(LLAMA_CPP)/src/llama-arch.cpp` for `LLM_ARCH_MUSE_GLIMMER` and stops
  before CMake runs if the symbol isn't there, so a stale checkout fails in a
  secon