Added support for the kotlin-language-server (#205)

* Added support for the kotlin-language-server

* Added support for the kotlin-language-server

* replaced hardtabs with softtabs
added vim-layouting hint
removed noise: log-level already defined in default config; grab root_dir explicitly
replaced vscode in favor of package_json

* removed unused global variable for passing lua-lint-check

* updated content of README with configuration options from package.json (https://raw.githubusercontent.com/fwcd/vscode-kotlin/master/package.json)

* intendation of first item corrected

* removed invalid offsetEncoding, set via util.utf8_config

> The provided utf8_confg from util.lua is intended for usages of the protocol extensions with clangd (https://clangd.llvm.org/extensions.html#utf-8-offsets)

1 files changed, 52 insertions, 0 deletions

diff --git a/lua/nvim_lsp/kotlin_language_server.lua b/lua/nvim_lsp/kotlin_language_server.lua
new file mode 100644
index 00000000..15fb995a
--- /dev/null
+++ b/lua/nvim_lsp/kotlin_language_server.lua
@@ -0,0 +1,52 @@
+--- default config for gradle-projects of the
+--- kotlin-language-server: https://github.com/fwcd/kotlin-language-server
+---
+--- This server requires vim to be aware of the kotlin-filetype.
+--- You could refer for this capability to:
+--- 	https://github.com/udalov/kotlin-vim (recommended)
+--- 	Note that there is no LICENSE specified yet.
+
+local util = require 'nvim_lsp/util'
+local configs = require 'nvim_lsp/configs'
+
+configs.kotlin_language_server = {
+  default_config = {
+    filetypes = { "kotlin" };
+    root_dir = util.root_pattern("settings.gradle");
+  };
+  docs = {
+    package_json = "https://raw.githubusercontent.com/fwcd/vscode-kotlin/master/package.json";
+    description = [[
+    A kotlin language server which was developed for internal usage and
+    released afterwards. Maintaining is not done by the original author,
+    but by fwcd.
+
+    It is builded via gradle and developed on github.
+    Source and additional description:
+    https://github.com/fwcd/kotlin-language-server
+    ]];
+    default_config = {
+      root_dir = [[root_pattern("settings.gradle")]];
+      capabilities = [[
+      smart code completion,
+      diagnostics,
+      hover,
+      document symbols,
+      definition lookup,
+      method signature help,
+      dependency resolution,
+      additional plugins from: https://github.com/fwcd
+
+      Snipped of License (refer to source for full License):
+
+      The MIT License (MIT)
+
+      Copyright (c) 2016 George Fraser
+      Copyright (c) 2018 fwcd
+
+      ]];
+    };
+  };
+}
+
+-- vim:et ts=2 sw=2