ltex-ls-plus: init at 18.2.0

This adds the `ltex-ls-plus` package, which is a language server for LanguageTool.
It is a fork of the `ltex-ls` package with additional features & bugfixes.

pkgs/by-name/lt/ltex-ls-plus/package.nix

@@ -0,0 +1,35 @@
+{ lib, stdenvNoCC, fetchurl, makeBinaryWrapper, jre_headless }:
+
+stdenvNoCC.mkDerivation rec {
+  pname = "ltex-ls-plus";
+  version = "18.2.0";
+
+  src = fetchurl {
+    url = "https://github.com/ltex-plus/ltex-ls-plus/releases/download/${version}/ltex-ls-plus-${version}.tar.gz";
+    sha256 = "sha256-8qxeaVGd2r3SLerCgHSpQWFbXhIngV2cdv/jWN7HHOE=";
+  };
+
+  nativeBuildInputs = [ makeBinaryWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out
+    cp -rfv bin/ lib/ $out
+    rm -fv $out/bin/.lsp-cli.json $out/bin/*.bat
+    for file in $out/bin/{ltex-ls-plus,ltex-cli-plus}; do
+      wrapProgram $file --set JAVA_HOME "${jre_headless}"
+    done
+
+    runHook postInstall
+  '';
+
+  meta = let inherit (lib) licenses maintainers; in {
+    homepage = "https://ltex-plus.github.io/ltex-plus/";
+    description = "LSP language server for LanguageTool";
+    license = licenses.mpl20;
+    mainProgram = "ltex-cli-plus";
+    maintainers = [ maintainers.FirelightFlagboy ];
+    platforms = jre_headless.meta.platforms;
+  };
+}