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/plugins/obsidian.lua

@@ -0,0 +1,53 @@
+-- ============================================================================
+-- OBSIDIAN: Full Obsidian vault integration for Neovim
+-- ============================================================================
+-- Wiki-link completion, daily notes, templates, backlinks, Telescope search,
+-- and more. Replaces the custom follow_obsidian_link() function.
+-- ============================================================================
+return {
+  "epwalsh/obsidian.nvim",
+  version = "*",
+  dependencies = {
+    "nvim-lua/plenary.nvim",
+    "hrsh7th/nvim-cmp",
+    "nvim-telescope/telescope.nvim",
+  },
+  event = {
+    "BufReadPre " .. vim.fn.expand("~") .. "/Nextcloud/ObsidianVault/**.md",
+    "BufNewFile " .. vim.fn.expand("~") .. "/Nextcloud/ObsidianVault/**.md",
+  },
+  ft = "markdown",
+  keys = {
+    { "<leader>on", "<cmd>ObsidianNew<cr>", desc = "New note" },
+    { "<leader>od", "<cmd>ObsidianToday<cr>", desc = "Today's daily note" },
+    { "<leader>os", "<cmd>ObsidianSearch<cr>", desc = "Search notes" },
+    { "<leader>ob", "<cmd>ObsidianBacklinks<cr>", desc = "Show backlinks" },
+    { "<leader>ot", "<cmd>ObsidianTemplate<cr>", desc = "Insert template" },
+    { "<leader>of", "<cmd>ObsidianFollowLink<cr>", desc = "Follow link" },
+    { "<leader>ol", "<cmd>ObsidianLink<cr>", mode = "v", desc = "Link selection to note" },
+  },
+  opts = {
+    workspaces = {
+      {
+        name = "vault",
+        path = "/Users/carlos/Nextcloud/ObsidianVault",
+      },
+    },
+    daily_notes = {
+      folder = "daily",
+      date_format = "%Y-%m-%d",
+    },
+    templates = {
+      folder = "templates",
+    },
+    completion = {
+      nvim_cmp = true,
+      min_chars = 2,
+    },
+    preferred_link_style = "wiki",
+    use_advanced_uri = false,
+    picker = {
+      name = "telescope.nvim",
+    },
+  },
+}