chore: add forwarding script for vector (#836)

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## Changes

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docs/infrastructure/vector/ACCESSING.md

@@ -0,0 +1,13 @@
+# Accessing Vector
+
+To access vector running in the k8s cluster, first forward it and then use the vector cli pointed at the forwarded http url.
+
+## Forwarding
+
+`./scripts/forward/vector.sh`
+
+## Vector CLI
+
+`nix-shell -p vector`
+
+`vector top`

scripts/forward/vector.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -euf
+
+FORWARD_NS=vector FORWARD_NAME=service/vector PORT=8686 FORWARD_PORT=8686 ./scripts/forward/service.sh