Initial commit: Go rewrite of node-lookup

Query PuppetDB for node facts via CLI. Replaces the original Python script.

- XDG config (~/.config/node-lookup/config.yaml) with env var overrides
- All flags from original tool preserved (-n, -F, -R, -m, --pm, -1, -2, -C, -A, -j)
- config init / config show subcommands
- Unit tests (23), Makefile, GoReleaser config, pre-commit hooks

💘 Generated with Crush

Assisted-by: Claude Sonnet 4.6 via Crush <crush@charm.land>

.goreleaser.yaml

@@ -0,0 +1,38 @@
+version: 2
+
+project_name: node-lookup
+
+before:
+  hooks:
+    - go mod tidy
+    - go test ./...
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    binary: node-lookup
+    ldflags:
+      - -s -w -X main.version={{.Version}}
+
+archives:
+  - formats:
+      - tar.gz
+    name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+
+checksum:
+  name_template: "checksums.txt"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"
+      - "^ci:"
+      - "^chore:"