Add pburl and pblastreport companion tools to the RPM

node-lookup output is useful for pivoting to Puppetboard, but there was no
quick way to turn a list of hosts into Puppetboard node-page URLs or to see
when each host last ran Puppet. These two tools close that gap and ship in the
same RPM so they are available wherever node-lookup is.

- Add pburl: reads hostnames from args or piped node-lookup output and prints
  "<host> <puppetboard-node-page-url>".
- Add pblastreport: prints "<host>\t<last-report-time>\t<url>" using
  report_timestamp from the PuppetDB v4 nodes endpoint. Supports --relative/-r
  (relative age) and --timezone/-z <IANA> (default: local timezone).
- Add internal/puppet package shared by both tools: config load, PuppetDB
  nodes query, Puppetboard URL construction, and no-TTY-safe stdin host reading.
- Add puppetboard_url config key (env NODE_LOOKUP_PUPPETBOARD_URL) to the
  shared config so config init/show scaffold it for the whole tool family.
- Build all three binaries individually (each is its own main package) and
  generate per-binary bash/zsh/fish completions in the Makefile, build-rpm.sh,
  and nfpm spec; cross-compile and attach all three per os/arch in the release
  pipeline.
- Document the tools, config key, and env var in AGENTS.md.

go.mod

@@ -3,8 +3,11 @@ module node-lookup
 go 1.25.7
 
 require (
-	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/spf13/cobra v1.10.2 // indirect
-	github.com/spf13/pflag v1.0.9 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
+	github.com/spf13/cobra v1.10.2
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.9 // indirect
 )