feat(nvim): v0.11: Use native LSP, Completion, Diagnostics

- Move all language LSP configurations to `nvim/lsp`
- Move nvim LSP configurations to `nvim/lua/core`
- Remove LSP attach keymaps where default ones exists and are usable
- Reorged LSP attach keymaps per plugin
- Move Lazy.nvim configurations to `nvim/lua/core`
- `nvim/init.lua` cleaned to only load other files
- Uniform diagnostics symbols across lualine & gutter

common/.config/nvim/init.lua

@@ -9,42 +9,10 @@
 -- Copy visual section to a line number -> :'<,'>t15 (copies To line 15)
 
 -- Load keymaps & options
-require("config")
-
---    `:help lazy.nvim.txt` for more info
-local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
-if not (vim.uv or vim.loop).fs_stat(lazypath) then
-    local lazyrepo = "https://github.com/folke/lazy.nvim.git"
-    local out = vim.fn.system({
-        "git",
-        "clone",
-        "--filter=blob:none",
-        "--branch=stable",
-        lazyrepo,
-        lazypath,
-    })
-    if vim.v.shell_error ~= 0 then
-        vim.api.nvim_echo({
-            { "Failed to clone lazy.nvim:\n", "ErrorMsg" },
-            { out,                            "WarningMsg" },
-            { "\nPress any key to exit..." },
-        }, true, {})
-        vim.fn.getchar()
-        os.exit(1)
-    end
-end
-
----@diagnostic disable-next-line: undefined-field
-vim.opt.rtp:prepend(lazypath)
-
---  You can also configure plugins after the setup call,
---    as they will be available in your neovim runtime.
-require("lazy").setup({
-    change_detection = {
-        notify = false,
-    },
-    build = {
-        warn_on_override = true,
-    },
-    spec = { { import = "plugins" } },
-})
+-- Order matters
+require("config.options")
+require("config.keymaps")
+require("core.lazy")
+require("core.lsp")
+require("config.filetype-based-keymaps")
+require("config.autocmd")