adapters: csharp, java, kotlin

lua/tiny-debugger/adapters/kotlin.lua

@@ -1 +1,25 @@
-return {}
+local loader = require("tiny-debugger.adapters.init")
+
+local M = {}
+
+function M.register(dap)
+  local kotlin_debug = loader.find_executable({ "kotlin-debug-adapter" })
+  if not kotlin_debug then return end
+
+  loader.register(dap, "kotlin", {
+    type = "executable",
+    command = kotlin_debug,
+  }, {
+    {
+      type = "kotlin",
+      request = "launch",
+      name = "Launch main",
+      mainClass = function()
+        return vim.fn.input("Main class: ")
+      end,
+      projectRoot = "${workspaceFolder}",
+    },
+  }, { "kotlin" })
+end
+
+return M