Split result into symboltable and types

TODO

@@ -12,14 +12,5 @@
 - Syscalls.
 - Error message with an empty file wrongly says that a ")" is expected.
 - Support any expressions for constants.
-
-# Shell
-- Replace hard coded ANSI codes with constants or functions.
-
-## Completion
-
-- Configure fzf to show only the current directory files
-- Support multiple selections for insertion in fzf.
-- Don't hardcode fzf binary path.
-- Send the word under the cursor to fzf as initial input.
-- Home directory expansion.
+- Built-in types are added in the symbol table constructor. It would be better to
+  add them outside, before the type analysis begins.