Adds rust analyser config

Author: step4

init.lua

@@ -653,7 +653,11 @@ local servers = {
   -- clangd = {},
   -- gopls = {},
   -- pyright = {},
-  -- rust_analyzer = {},
+  rust_analyzer = {
+    rustfmt = {
+      overrideCommand = 'leptosfmt --stdin --rustfmt'
+    }
+  },
   -- tsserver = {},
   -- html = { filetypes = { 'html', 'twig', 'hbs'} },