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/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,
+    },
 }