feat: Llama Stack Meta Reference installation script (#1383)

# What does this PR do?
Add installation script for Llama Stack Meta Reference distro (Docker
only).

# Closes #1374 

## Test Plan
./instal.sh

---------

Co-authored-by: Sébastien Han <seb@redhat.com>

install.sh

@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+set -Eeuo pipefail
+
+PORT=8321
+OLLAMA_PORT=11434
+MODEL_ALIAS="llama3.2:3b"
+SERVER_IMAGE="llamastack/distribution-ollama:0.2.2"
+WAIT_TIMEOUT=300
+
+log(){ printf "\e[1;32m%s\e[0m\n" "$*"; }
+die(){ printf "\e[1;31m❌ %s\e[0m\n" "$*" >&2; exit 1; }
+
+if command -v docker &> /dev/null; then
+  ENGINE="docker"
+  HOST_DNS="host.docker.internal"
+elif command -v podman &> /dev/null; then
+  ENGINE="podman"
+  HOST_DNS="host.containers.internal"
+else
+  die "Docker or Podman is required. Install Docker: https://docs.docker.com/get-docker/ or Podman: https://podman.io/getting-started/installation"
+fi
+
+# Clean up any leftovers from earlier runs
+for name in ollama-server llama-stack; do
+  ids=$($ENGINE ps -aq --filter "name=^${name}$")
+  if [ -n "$ids" ]; then
+    log "⚠️   Found existing container(s) for '${name}', removing..."
+    $ENGINE rm -f "$ids"
+  fi
+done
+
+###############################################################################
+# 1. Ollama
+###############################################################################
+log "🦙  Starting Ollama…"
+$ENGINE run -d --name ollama-server \
+  -p "${OLLAMA_PORT}:11434" \
+  ollama/ollama > /dev/null 2>&1
+
+log "⏳  Waiting for Ollama daemon…"
+if ! timeout "$WAIT_TIMEOUT" bash -c \
+    "until curl -fsS http://localhost:${OLLAMA_PORT}/ 2>/dev/null | grep -q 'Ollama'; do sleep 1; done"; then
+  log "❌  Ollama daemon did not become ready in ${WAIT_TIMEOUT}s; dumping container logs:"
+  $ENGINE logs ollama-server --tail=200
+  die "Ollama startup failed"
+fi
+
+log "📦  Ensuring model is pulled: ${MODEL_ALIAS}..."
+$ENGINE exec ollama-server ollama pull "${MODEL_ALIAS}" > /dev/null 2>&1
+
+###############################################################################
+# 2. Llama‑Stack
+###############################################################################
+log "🦙📦  Starting Llama‑Stack…"
+$ENGINE run -d --name llama-stack \
+  -p "${PORT}:${PORT}" \
+  --add-host="${HOST_DNS}:host-gateway" \
+  "${SERVER_IMAGE}" \
+  --port "${PORT}" \
+  --env INFERENCE_MODEL="${MODEL_ALIAS}" \
+  --env OLLAMA_URL="http://${HOST_DNS}:${OLLAMA_PORT}" > /dev/null 2>&1
+
+log "⏳  Waiting for Llama-Stack API…"
+if ! timeout "$WAIT_TIMEOUT" bash -c \
+  "until curl -fsS http://localhost:${PORT}/v1/health 2>/dev/null | grep -q 'OK'; do sleep 1; done"; then
+  log "❌  Llama-Stack did not become ready in ${WAIT_TIMEOUT}s; dumping container logs:"
+  $ENGINE logs llama-stack --tail=200
+  die "Llama-Stack startup failed"
+fi
+
+###############################################################################
+# Done
+###############################################################################
+log ""
+log "🎉  Llama‑Stack is ready!"
+log "👉  API endpoint: http://localhost:${PORT}"
+log "📖 Documentation: https://llama-stack.readthedocs.io/en/latest/references/index.html"
+log "💻 To access the llama‑stack CLI, exec into the container:"
+log "   $ENGINE exec -ti llama-stack bash"
+log ""