fixes #19795; fixes #11852; fixes #19974; remove parsing pipeline, Nim now parses the whole module at one time (#21379)

* fixes #19795; remove parse pipeline

* isScript

* fixes nimscriptapi

* don't touch reorder

* check script

* fixes tests

* it seems implicit imports of system cause troubles

* access the first child of `nkStmtList`

* ignore comments

* minor messages

* perhaps increases hloLoopDetector

* the module is a stmtList, which changes the errors

* fixes nimdoc

* fixes tlinter

* fixes nim  secret tests

* fixes arc_misc

* fixes nim secret tests again

* safe; fixes one more test

* GlobalError is the root cause too

* fixes parsing errors

* put emit types to the cfsForwardTypes section

* fixes #11852; `{.push checks:off}` now works in procs

* disable navigator

* fixes nimdoc

* add tests for JS

* fixes nimsuggest

tests/pragmas/tpush.nim

@@ -13,3 +13,15 @@ proc WarnMe() =
     x: int
   echo(x)
 
+# bug #11852
+proc foo(x: string, y: int, res: int) =
+  {.push checks: off}
+  var a: ptr char = unsafeAddr(x[y])
+  {.pop.}
+  if x.len > y:
+    doAssert ord(a[]) == 51
+  else:
+    doAssert x.len + 48 == res
+
+foo("", 0, 48)
+foo("abc", 40, 51)

tests/pragmas/treorder.nim

@@ -1,4 +1,5 @@
 discard """
+matrix: "--experimental:codeReordering"
 output:'''0
 1
 2