fix: restore iota blocks, asm --format flag and prose after the syntax pass

docs/ARCHITECTURE.md

@@ -26,7 +26,7 @@ Repository: [sourcedock.dev/petrbalvin/gasm-devkit](https://sourcedock.dev/petrb
 graph TD
     SRC["source .s"] --> LEX["lexer<br/>token stream"]
     LEX --> PAR["parser<br/>AST + diagnostics"]
-    LEX --> FMT["format<br/>re-space tokens"]
+    LEX --> FMT["s<br/>re-space tokens"]
     PAR --> LINT["lint<br/>static checks"]
     PAR --> LSP["lsp server"]
     LEX --> LSP
@@ -157,7 +157,7 @@ Two deeper analyses sit on top of the AST:
   reference) and a literal index is range-checked; a named index constant such
   as `$PCDATA_StackMapIndex` is accepted without a range check.
 
-### `format`
+### `s`
 
 The formatter works on the **token stream, not the AST**, so it preserves
 every line — comments and blanks included.  It normalises indentation, operand