feat(neovim): Rust dev with rustaceanvim & LSP servers installation through OS installer and NOT mason

- Use `rustaceanvim` for Rust development
- `rustaceanvim` keymaps in NeoVim `after` file
- Remove Rust LSP setup through builtin LSP
- Remove LSP installations from Mason when equivalent available through
  OS installers
- All LSP plugins in `code-lsp.lua`

common/.config/nvim/after/ftplugin/rust.lua

@@ -0,0 +1,23 @@
+-- TODO: Map all native Nvim 0.11 LSP commands to corresponding rustaceanvim ones
+-- grn -> Rename
+-- grr -> References
+-- gri -> Implementation
+-- gO -> document_symbol
+-- gra -> code_action
+-- Mine
+-- F2 -> Rename
+-- gD -> Go to definition
+-- <leader>cr -> References
+-- <leader>co -> document_symbol
+
+if pcall(require, "rustaceanvim") then
+    local bufnr = vim.api.nvim_get_current_buf()
+
+    vim.keymap.set("n", "<C-.>", function()
+        vim.cmd.RustLsp("codeAction")
+    end, { silent = true, buffer = bufnr })
+
+    vim.keymap.set("n", "K", function()
+        vim.cmd.RustLsp({ "hover", "actions" })
+    end, { silent = true, buffer = bufnr })
+end

common/.config/nvim/lsp/rust_analyzer.lua

@@ -1 +0,0 @@
-return {}

common/.config/nvim/lua/core/lsp.lua

@@ -1,3 +1,7 @@
+-- TIP:
+-- Step 1: Install the LSP through either of the following:
+--         OS Installer > Brew-linux > Mason NeoVim Plugin
+-- Step 2: Append the LSP server name in the below array
 vim.lsp.enable({
     "bashls",
     "cssls",
@@ -6,38 +10,58 @@ vim.lsp.enable({
     "html",
     "jsonls",
     "lua_ls",
-    "omnisharp",
     "pylsp",
-    "rust_analyzer",
     "sqlls",
     "ts_ls",
-    -- TODO: Enable inlay_hints for all of them
 })
 
 -- TIP: On new systems, install these through Mason
+-- They aren't usually found on either OS installer or brew-linux
 ---@diagnostic disable-next-line: unused-local
 local to_installed = vim.tbl_keys({
-    "black", -- Python formatter
-    "csharpier", -- C# formatter
-    "djlint", -- Handlebar Formatter
-    "markdown-toc",
-    "markdownlint",
-    "netcoredbg", -- C# Debugger
-    "prettier",
-    "prettierd",
-    "shellharden",
-    "shfmt",
-    "stylua",
-    "trivy", -- Vulnerability Linter
-    "yamlfmt",
+    "codelldb",
+    "css-lsp",
+    "docker-compose-language-service",
+    "html-lsp",
+    "json-lsp",
+    "sqlls",
 })
 
+-- Setup native diagnostic
+vim.diagnostic.config({
+    underline = true,
+    update_in_insert = false,
+    severity_sort = true,
+    float = {
+        border = "rounded",
+        source = true,
+    },
+    virtual_text = {
+        enabled = true,
+        severity = { min = vim.diagnostic.severity.ERROR },
+    },
+    virtual_lines = {
+        current_line = true,
+        severity = { min = vim.diagnostic.severity.INFO },
+    },
+})
+
+-- Change diagnostic symbols in the sign column (gutter)
+if vim.g.have_nerd_font then
+    local signs = require("config.util").icons.diagnostics
+    local diagnostic_signs = {}
+    for type, icon in pairs(signs) do
+        diagnostic_signs[vim.diagnostic.severity[type]] = icon
+    end
+    vim.diagnostic.config({ signs = { text = diagnostic_signs } })
+end
+
 vim.api.nvim_create_autocmd("LspAttach", {
     group = vim.api.nvim_create_augroup("lsp-attach", { clear = true }),
     callback = function(event)
         local client = vim.lsp.get_client_by_id(event.data.client_id)
 
-        -- Setup LSP completion
+        -- Setup native LSP completion
         -- This is already done by blink, but better prefer the builtin one
         if client:supports_method("textDocument/completion") then
             vim.opt.completeopt = { "menu", "menuone", "noinsert", "fuzzy", "popup" }

common/.config/nvim/lua/plugins/code-lsp.lua

@@ -57,4 +57,28 @@ return {
             },
         },
     },
+
+    -- Rust
+    {
+        "mrcjkb/rustaceanvim",
+        version = "^6",
+        config = function()
+            vim.g.rusteceanvim = {
+                dap = {
+                    adapter = {
+                        type = "executable",
+                        command = "codelldb",
+                        name = "codelldb",
+                    },
+                },
+            }
+        end,
+    },
+    {
+        "saecki/crates.nvim",
+        tag = "stable",
+        config = function()
+            require("crates").setup()
+        end,
+    },
 }

common/.config/nvim/lua/plugins/lang-rust.lua

@@ -1,9 +0,0 @@
-return {
-    {
-        "saecki/crates.nvim",
-        tag = "stable",
-        config = function()
-            require("crates").setup()
-        end,
-    },
-}