Add rust DAP debugging setup to nvim

Wires up nvim-dap, nvim-dap-ui and rustaceanvim, enables the
NvChad blink completion lazyspec, activates the treesitter
ensure_installed list and adds DAP/rustaceanvim keymaps.

config/nvim/lua/mappings.lua

@@ -8,3 +8,21 @@ map("n", ";", ":", { desc = "CMD enter command mode" })
 map("i", "jk", "<ESC>")
 
 -- map({ "n", "i", "v" }, "<C-s>", "<cmd> w <cr>")
+
+-- Nvim DAP
+map("n", "<Leader>dl", "<cmd>lua require'dap'.step_into()<CR>", { desc = "Debugger step into" })
+map("n", "<Leader>dj", "<cmd>lua require'dap'.step_over()<CR>", { desc = "Debugger step over" })
+map("n", "<Leader>dk", "<cmd>lua require'dap'.step_out()<CR>", { desc = "Debugger step out" })
+map("n", "<Leader>dc", "<cmd>lua require'dap'.continue()<CR>", { desc = "Debugger continue" })
+map("n", "<Leader>db", "<cmd>lua require'dap'.toggle_breakpoint()<CR>", { desc = "Debugger toggle breakpoint" })
+map(
+	"n",
+	"<Leader>dd",
+	"<cmd>lua require'dap'.set_breakpoint(vim.fn.input('Breakpoint condition: '))<CR>",
+	{ desc = "Debugger set conditional breakpoint" }
+)
+map("n", "<Leader>de", "<cmd>lua require'dap'.terminate()<CR>", { desc = "Debugger reset" })
+map("n", "<Leader>dr", "<cmd>lua require'dap'.run_last()<CR>", { desc = "Debugger run last" })
+
+-- rustaceanvim
+map("n", "<Leader>dt", "<cmd>lua vim.cmd('RustLsp testables')<CR>", { desc = "Debugger testables" })