Add proboctl CLI and move seed commands into it

Introduce a new proboctl Cobra CLI for Probo instance management
that connects directly to PostgreSQL. Move the standalone
common-third-parties-import and common-tracker-patterns-import
commands into proboctl as `proboctl seed common-third-parties`
and `proboctl seed common-tracker-patterns`, replacing flag-based
PG connection with a shared factory pattern.

Signed-off-by: Émile Ré <emile@probo.com>

pkg/proboctl/version/version.go

@@ -0,0 +1,49 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package version
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"go.probo.inc/probo/pkg/proboctl/cmdutil"
+	"go.probo.inc/probo/pkg/version"
+)
+
+func NewCmdVersion(f *cmdutil.Factory) *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "Print the version of proboctl",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			info := version.GetBuildInfo()
+
+			v := f.Version
+			if v == "" || v == "unknown" {
+				v = info.Version
+			}
+
+			_, _ = fmt.Fprintf(
+				f.IOStreams.Out,
+				"proboctl version %s (commit: %s, built: %s, go: %s)\n",
+				v,
+				info.Commit,
+				info.BuildDate,
+				info.GoVersion,
+			)
+
+			return nil
+		},
+	}
+}