Allow parse-time evaluation of calls, pipelines and subexpressions (#9499)

Co-authored-by: Antoine Stevan <44101798+amtoine@users.noreply.github.com>

crates/nu-parser/src/lib.rs

@@ -1,5 +1,4 @@
 mod deparse;
-mod eval;
 mod flatten;
 mod known_external;
 mod lex;