added rust analyzer

Author: aswaroop976

init.lua

@@ -626,7 +626,7 @@ require('lazy').setup({
         -- clangd = {},
         -- gopls = {},
         -- pyright = {},
-        -- rust_analyzer = {},
+        rust_analyzer = {},
         -- ... etc. See `:help lspconfig-all` for a list of all the pre-configured LSPs
         --
         -- Some languages (like typescript) have entire language plugins that can be useful: