chore: remove local/unused plugins and refactor core configs

- Remove locally-developed or rarely-used plugin packages (codetyper, curls, edgy, flash) to reduce maintenance surface, external deps, and startup cost; these were local/optional and caused complexity.
- Clean up stale/keymap docs and small duplicate or experimental files (keymaps/README.md, sudoku keymaps).
- Apply targeted refactors to core modules for readability, robustness, and to align Java/DAP/Copilot integrations with local environment.
- Removed plugin modules:
  - lua/cargdev/plugins/codetyper.lua (deleted)
  - lua/cargdev/plugins/curls.lua (deleted)
  - lua/cargdev/plugins/edgy.lua (deleted)
  - lua/cargdev/plugins/flash.lua (deleted)
  - Added .codetyper to .gitignore
- Java / JDTLS:
  - ftplugin/java.lua: pin jdtls java executable to JDK 25, switch to mac_arm config, enable LSP formatter and declare multiple runtimes (JavaSE-17, JavaSE-25).
- Notifications & startup UX:
  - lua/cargdev/core/function/notification_manager.lua: large refactor — use local aliases (api, cmd, loop, opt), improved docs, dashboard-aware handling, nvim-notify fallback, safer tracking and cleanup of notifications.
- Utilities & monitors:
  - lua/cargdev/core/function/performance_monitor.lua: use local references, better notify usage and docs.
  - lua/cargdev/core/function/project_commands.lua: add docs, use local api/fn/notify, clearer RunProject/DebugProject commands.
- Terminal helper:
  - lua/cargdev/core/function/openTerminal.lua: add module docs and small refactor to use local cmd/api aliases and expose keymap.
- Keymaps & docs:
  - Removed stale keymaps README (lua/cargdev/core/keymaps/README.md).
  - Reworked many keymap files: docstrings, renamed/moved mappings to avoid conflicts, moved DAP mappings into dap plugin config, removed/disabled experimental mappings (see files under lua/cargdev/core/keymaps/*).
  - Adjusted quick keybindings and prefixes to reduce overlaps.
- Plugins & integrations:
  - lua/cargdev/plugins/formatting.lua: disabled google-java-format fallback for java (prefer JDTLS).
  - lua/cargdev/plugins/dap.lua: added additional DAP configs (Bun launch, attach helper), moved/registered dap keymaps here.
  - lua/cargdev/plugins/copilot.lua: reorganized Copilot/Copilot-cmp/CopilotChat config and added copilot source to nvim-cmp.
  - lua/cargdev/plugins/nvim-cmp.lua: added copilot source and small formatting tweak.

lua/cargdev/core/function/openTerminal.lua

@@ -1,48 +1,54 @@
+--- Terminal toggle utility.
+--- Provides a function and keybinding (`<Leader>ter`) to open or close a
+--- vertical-split zsh terminal on the right side of the editor. The terminal
+--- automatically enters insert mode on focus and exits insert mode on blur.
+--- @module openTerminal
+
 vim.g.mapleader = " "
 
 local keymap = vim.keymap
+local cmd = vim.cmd
+local api = vim.api
 
--- Function to open terminal
+--- Toggle a terminal split on the rightmost side of the editor.
+--- If the rightmost buffer is already a terminal, it closes it.
+--- Otherwise, opens a new vertical split running zsh with line numbers
+--- disabled and auto insert-mode behavior on focus/blur.
 local function open_terminal()
   -- Move to the rightmost buffer (equivalent to `<C-l>` multiple times)
-  vim.cmd("wincmd l")
-  vim.cmd("wincmd l")
-  vim.cmd("wincmd l")
-  vim.cmd("wincmd l")
+  cmd("wincmd l")
+  cmd("wincmd l")
+  cmd("wincmd l")
+  cmd("wincmd l")
 
   -- Get current buffer number and type
-  local buf_num = vim.api.nvim_get_current_buf()
-  local buf_type = vim.api.nvim_buf_get_option(buf_num, "buftype")
+  local buf_num = apinvim_get_current_buf()
+  local buf_type = apinvim_buf_get_option(buf_num, "buftype")
 
   if buf_type == "terminal" then
     -- If already in a terminal, close it
-    vim.cmd("q")
+    cmd("q")
   else
     -- Open terminal in a vertical split
-    vim.cmd("vsp | term zsh")
+    cmd("vsp | term zsh")
 
     -- Disable line numbers in terminal
-    vim.cmd("setlocal nonumber norelativenumber")
+    cmd("setlocal nonumber norelativenumber")
 
     -- Auto-start insert mode in terminal
-    vim.api.nvim_create_autocmd({ "BufWinEnter", "WinEnter" }, {
+    apinvim_create_autocmd({ "BufWinEnter", "WinEnter" }, {
       buffer = 0,
       command = "startinsert!",
     })
-    vim.api.nvim_create_autocmd("BufLeave", {
+    apinvim_create_autocmd("BufLeave", {
       buffer = 0,
       command = "stopinsert!",
     })
 
-    -- Terminal key mappings
-    vim.keymap.set("t", "<C-h>", "<C-\\><C-n><C-w>h", { buffer = true })
-    vim.keymap.set("t", "<C-t>", "<C-\\><C-n>:q<CR>", { buffer = true })
-    vim.keymap.set("t", "<C-\\><C-\\>", "<C-\\><C-n>", { buffer = true })
-
     -- Start terminal in insert mode
-    vim.cmd("startinsert!")
+    cmd("startinsert!")
   end
 end
 
--- Keybinding to open terminal
+--- Map `<Leader>ter` in normal mode to toggle the terminal split.
 keymap.set("n", "<Leader>ter", open_terminal, { noremap = true, silent = true })