Added files

Add ha-watchdog v1.1.0

Go tool that lists Home Assistant apps, lets you choose which to
watch, and starts them again if they stop.

- Interactive menu to list apps (numbered, with state, version and
  available updates) and add or remove them from a watchlist
- Headless -daemon mode that monitors the saved watchlist
- Persistent JSON watchlist
- Retry cap (default 5 starts per 10 minutes) with a cooldown between
  attempts; gives up on apps that keep failing
- Persistent notifications on restart and when giving up
- Skips apps that are unavailable, detached or not installed
- Backends: Supervisor API, local ha CLI, and remote ha CLI over SSH
  for running from a separate monitoring machine
- Version and build date injected via ldflags (see Makefile)
- README covering build, install, remote monitoring and systemd setup

Makefile

@@ -0,0 +1,18 @@
+VERSION    ?= 1.1.0
+BUILD_DATE := $(shell date -u +%Y-%m-%dT%H:%M:%SZ)
+export CGO_ENABLED := 0
+LDFLAGS    := -s -w -X main.version=$(VERSION) -X main.buildDate=$(BUILD_DATE)
+
+.PHONY: build arm64 amd64 clean
+
+build:
+	go build -ldflags "$(LDFLAGS)" -o ha-watchdog .
+
+arm64:
+	GOOS=linux GOARCH=arm64 go build -ldflags "$(LDFLAGS)" -o ha-watchdog-arm64 .
+
+amd64:
+	GOOS=linux GOARCH=amd64 go build -ldflags "$(LDFLAGS)" -o ha-watchdog-amd64 .
+
+clean:
+	rm -f ha-watchdog ha-watchdog-arm64 ha-watchdog-amd64