Initial StartOS 0.3.5.1 packaging scaffold for Kamado Pool

Multi-stage Dockerfile clones KamadoPool at a pinned SHA, builds
ckpool and kamado-api (with embedded Svelte UI), runtime image
supervises both processes via tini + wait -n. Config covers
bitcoind mainnet/testnet4 variant, payout address, coinbase tag,
vardiff knobs, and log level. Web UI interface only — stratum
:3333 requires a router port-forward or simpleproxy workaround
because StartOS 0.3.x does not forward raw TCP on LAN.

TODO before first build: pin KAMADO_REPO + KAMADO_SHA in the
Dockerfile to a pushed commit.

Makefile

@@ -0,0 +1,31 @@
+PKG_ID := $(shell yq -r .id manifest.yaml)
+PKG_VERSION := $(shell yq -r .version manifest.yaml)
+
+TS_FILES := $(shell find ./scripts -name \*.ts 2>/dev/null)
+
+.DELETE_ON_ERROR:
+
+all: verify
+
+verify: $(PKG_ID).s9pk
+	start-sdk verify s9pk $(PKG_ID).s9pk
+
+install: $(PKG_ID).s9pk
+	start-cli package install $(PKG_ID).s9pk
+
+$(PKG_ID).s9pk: manifest.yaml instructions.md icon.png LICENSE scripts/embassy.js image.tar
+	start-sdk pack
+
+scripts/embassy.js: $(TS_FILES)
+	deno run --allow-read --allow-write --allow-env --allow-net scripts/bundle.ts
+
+image.tar: Dockerfile docker_entrypoint.sh
+	docker buildx build --tag start9/$(PKG_ID)/main:$(PKG_VERSION) \
+		--platform=linux/arm64/v8,linux/amd64 \
+		--build-arg ARCH=$(shell uname -m) \
+		-o type=oci,dest=image.tar .
+
+clean:
+	rm -f $(PKG_ID).s9pk image.tar scripts/embassy.js
+
+.PHONY: all verify install clean