stalwart-vandelay: init at 1.0.2

add jmap import and export tool which may aid in planned refactor work
for stalwart NixOS module

* changelog: https://github.com/stalwartlabs/vandelay/releases/tag/v1.0.2

Related to: #511880

---

implement pr feedback:

* https://github.com/NixOS/nixpkgs/pull/530899#discussion_r3406372237
* https://github.com/NixOS/nixpkgs/pull/530899#discussion_r3406387919
* https://github.com/NixOS/nixpkgs/pull/530899#discussion_r3406391991

pkgs/by-name/st/stalwart-vandelay/package.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  cacert,
+  fetchFromGitHub,
+  rustPlatform,
+  versionCheckHook,
+}:
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "vandelay";
+  version = "1.0.2";
+  src = fetchFromGitHub {
+    owner = "stalwartlabs";
+    repo = "vandelay";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-RwcSwgzAqagm4JpNXptnXbHhtl7KoyPoiuSf2kBwzt8=";
+  };
+  cargoHash = "sha256-hxnnBy7YpwYhxw1jtGckNt0zU/6sdsXC8geFuwIJjWE=";
+  __structuredAttrs = true;
+  __darwinAllowLocalNetworking = true;
+  # called `Result::unwrap()` on an `Err` value: Tls("rustls platform verifier: unexpected error: No CA certificates were loaded from the system")
+  nativeCheckInputs = [
+    cacert
+  ];
+  doInstallCheck = true;
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  meta = {
+    description = "JMAP importer-exporter (and backup tool)";
+    longDescription = ''
+      One-shot account migration and backup across JMAP, IMAP, CalDAV, CardDAV, WebDAV, ManageSieve, Maildir, Google Takeout and Microsoft Exchange.
+    '';
+    homepage = "https://github.com/stalwartlabs/vandelay";
+    changelog = "https://github.com/stalwartlabs/vandelay/blob/${finalAttrs.src.tag}/CHANGELOG.md";
+    license = lib.licenses.OR [
+      lib.licenses.mit
+      lib.licenses.apsl20
+    ];
+    mainProgram = "vandelay";
+    maintainers = with lib.maintainers; [
+      debtquity
+    ];
+  };
+})