feat: initial commit — unarr CLI

Search, inspect, stream, and download torrents from the terminal.
Replaces the entire *arr stack with a single binary.

Dockerfile

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+# ---- Build stage ----
+# Build context must be the parent directory containing both torrentclaw-cli/
+# and go-client/. Use: docker build -f torrentclaw-cli/Dockerfile .
+# Or use the provided docker-build.sh script.
+FROM golang:1.24-alpine AS builder
+
+RUN apk add --no-cache git ca-certificates
+
+# Copy go-client dependency (local replace in go.mod -> ../go-client)
+WORKDIR /deps
+COPY go-client/ /deps/go-client/
+
+# Copy go.mod/go.sum first for layer caching
+WORKDIR /src
+COPY torrentclaw-cli/go.mod torrentclaw-cli/go.sum ./
+RUN go mod edit -replace github.com/torrentclaw/go-client=/deps/go-client
+RUN go mod download
+
+# Copy source (changes here won't invalidate mod cache)
+COPY torrentclaw-cli/ .
+RUN go mod edit -replace github.com/torrentclaw/go-client=/deps/go-client
+
+RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o /unarr ./cmd/unarr/
+
+# ---- Runtime stage ----
+FROM alpine:3.21
+
+RUN apk add --no-cache ca-certificates tzdata
+
+# Non-root user (UID 1000 matches typical host user for volume permissions)
+RUN addgroup -g 1000 unarr && adduser -u 1000 -G unarr -D -h /home/unarr unarr
+
+# Default directories
+RUN mkdir -p /config /downloads /data && \
+    chown -R unarr:unarr /config /downloads /data
+
+USER unarr
+
+COPY --from=builder /unarr /usr/local/bin/unarr
+
+# Environment: point config/data to container paths
+ENV UNARR_CONFIG_DIR=/config
+ENV UNARR_DOWNLOAD_DIR=/downloads
+ENV XDG_DATA_HOME=/data
+
+VOLUME ["/config", "/downloads", "/data"]
+
+ENTRYPOINT ["unarr"]
+CMD ["start"]