refactor: reorganize merged repo into clean directory structure

Reorganize the merged KNELServerBuild + PFVCluster repo:

  provisioning/    server provisioning (was ProjectCode/ +
                   Project-Includes/ + Project-ConfigFiles/)
  tests/           test suite (was Project-Tests/)
  perf/            Proxmox perf scripts (was top-level *.sh + scripts/)
  docs/            all documentation (was ProjectDocs/ + PROJECT.md +
                   K8S.md + TODO.md)
  dns-cluster-setup/  Technitium DNS cluster (unchanged)
  netinfra/        netinfra audit scripts (unchanged)
  switches/        switch configs (unchanged)
  vendor/          vendored KNELShellFramework (unchanged)

Update all internal path references from old directory names
(ProjectCode/, Project-Includes/, Project-Tests/) to the new ones
(provisioning/, tests/) across all scripts.

🤖 Generated with [Crush](https://github.com/charmassociates/crush)

Assisted-by: GLM-5 via Crush <crush@charm.land>

dns-cluster-setup/remote-dns.sh

@@ -8,7 +8,7 @@
 #
 # WHY: one place to configure host aliases/users/keys, one place to audit,
 # and the command scanner only permits ssh when invoked indirectly via a
-# script. Mirrors the pattern of Project-Tests/remote.sh.
+# script. Mirrors the pattern of tests/remote.sh.
 #
 # HOSTS (override IPs via env if needed):
 #   tsrouter       tailscale-router.knel.net  (PRODUCTION — READ-ONLY here)