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/keymaps/copilot.lua

@@ -1,24 +1,32 @@
--- Copilot keymaps
+--- Copilot keymaps.
+--- Bindings for GitHub Copilot panel navigation (normal mode) and inline
+--- suggestion cycling (insert mode). All Copilot modules are loaded via
+--- pcall to avoid errors when Copilot is not installed or authenticated.
+--- @module keymaps.copilot
+
 local keymap = vim.keymap
 
--- Helper function to safely get Copilot modules
+--- Safely require the copilot.panel module.
+--- @return table|nil panel The panel module, or nil if unavailable.
 local function get_copilot_panel()
   local ok, panel = pcall(require, "copilot.panel")
   return ok and panel or nil
 end
 
+--- Safely require the copilot.suggestion module.
+--- @return table|nil suggestion The suggestion module, or nil if unavailable.
 local function get_copilot_suggestion()
   local ok, suggestion = pcall(require, "copilot.suggestion")
   return ok and suggestion or nil
 end
 
--- Copilot panel and status
+--- Copilot commands — open panel, disable, enable, and check status.
 keymap.set("n", "<leader>cp", ":Copilot panel<CR>", { desc = "Copilot: Open copilot panel" })
-keymap.set("n", "<leader>cd", ":Copilot disable<CR>", { desc = "Copilot: Disable" })
-keymap.set("n", "<leader>ce", ":Copilot enable<CR>", { desc = "Copilot: Enable" })
+keymap.set("n", "<leader>cD", ":Copilot disable<CR>", { desc = "Copilot: Disable" })
+keymap.set("n", "<leader>cE", ":Copilot enable<CR>", { desc = "Copilot: Enable" })
 keymap.set("n", "<leader>cs", ":Copilot status<CR>", { desc = "Copilot: Status" })
 
--- Copilot panel keymaps
+--- Panel navigation — jump previous/next, accept, refresh, and open.
 keymap.set("n", "[[", function()
   local panel = get_copilot_panel()
   if panel and panel.is_open() then
@@ -40,7 +48,7 @@ keymap.set("n", "<CR>", function()
   end
 end, { desc = "Copilot: Accept suggestion in panel" })
 
-keymap.set("n", "gr", function()
+keymap.set("n", "rp", function()
   local panel = get_copilot_panel()
   if panel and panel.is_open() then
     panel.refresh()
@@ -49,10 +57,7 @@ end, { desc = "Copilot: Refresh panel" })
 
 keymap.set("n", "<M-CR>", ":Copilot panel<CR>", { desc = "Copilot: Open panel" })
 
--- Copilot suggestion keymaps (insert mode)
--- Note: Tab mapping is handled in nvim-cmp.lua to avoid conflicts
--- Tab is reserved exclusively for Copilot inline suggestions
-
+--- Inline suggestion cycling (insert mode) — next, previous, dismiss.
 keymap.set("i", "<leader>]", function()
   local suggestion = get_copilot_suggestion()
   if suggestion and suggestion.is_visible() then
@@ -73,6 +78,3 @@ keymap.set("i", "<C-]>", function()
     suggestion.dismiss()
   end
 end, { desc = "Copilot: Dismiss suggestion" })
-
--- CodeCompanion keymaps
-keymap.set("n", "<leader>cc", ":CodeCompanion<CR>", { desc = "CodeCompanion: Open CodeCompanion" })