feat: add 10 new language adapters

Adds Dart (with optional Flutter auto-detection), Bash (bash-debug-adapter with mason bashdb_dir probing), R (vscDebugger package preflight), Elixir (mix_task), Haskell, OCaml (ocamlearlybird), Zig/Nim/Crystal (via codelldb filetype extension), and F# (via netcoredbg filetype extension). Expands built-in adapter coverage from 12 to 22 languages.

lua/turbo-debug/adapters/r.lua

@@ -0,0 +1,39 @@
+local loader = require("turbo-debug.adapters.init")
+
+local M = {}
+
+-- vscDebugger is an R package, not a standalone binary. It must be installed
+-- in the user's R library (install.packages("vscDebugger") or remotes::install_github).
+-- Silently skip registration if it's missing — matches the "no noise when
+-- prereqs missing" invariant used by the other adapters.
+local function has_vsc_debugger()
+  if vim.fn.executable("Rscript") ~= 1 then return false end
+  vim.fn.system({
+    "Rscript",
+    "-e",
+    "if (!requireNamespace('vscDebugger', quietly=TRUE)) quit(status=1)",
+  })
+  return vim.v.shell_error == 0
+end
+
+function M.register(dap)
+  local R = loader.find_executable({ "R" })
+  if not R then return end
+  if not has_vsc_debugger() then return end
+
+  loader.register(dap, "r", {
+    type = "executable",
+    command = R,
+    args = { "-e", "vscDebugger::.vsc.listenForDAP()" },
+  }, {
+    {
+      type = "r",
+      request = "launch",
+      name = "Launch R file",
+      program = "${file}",
+      cwd = "${workspaceFolder}",
+    },
+  }, { "r", "rmd" })
+end
+
+return M