feat(dap.lua): add configuration for dap and dap-ui plugins to enable debugging features in Neovim

feat(lsp-config.lua): configure python lsp using pylsp to provide language server capabilities for Python files
refactor(magma.lua): remove magma plugin configuration as it is no longer used
feat(mason.lua): add configuration for mason and mason-nvim-dap plugins to enable package management and debugging features in Neovim
refactor(init.lua): set maplocalleader to "\\" for easier keybindings
refactor(remap.lua): remove setting mapleader to " " as it is no longer needed, add keybinding for toggling file explorer using NvimTreeToggle command

lua/absolute/after/dap.lua

@@ -0,0 +1,28 @@
+local dap = require("dap")
+local dapui = require("dapui")
+local dap_python = require("dap-python")
+
+dap.listeners.after.event_initialized["dapui_config"] = function()
+    dapui.open()
+end
+dap.listeners.before.event_terminated["dapui_config"] = function()
+    dapui.close()
+end
+dap.listeners.before.event_exited["dapui_config"] = function()
+    dapui.close()
+end
+
+
+local path = "~/.local/share/nvim/mason/packages/debugpy/venv/bin/python"
+dap_python.setup(path)
+
+-- Setup Mappings
+local opts = { noremap = true, silent = true }
+
+opts.desc = "Toggle breakpoint"
+vim.keymap.set("n", "<leader>db", "<cmd> DapToggleBreakpoint<CR>", opts)
+
+opts.desc = "Debug Python Run"
+vim.keymap.set("n", "<leader>dpr", function()
+    dap_python.test_method()
+end, opts)