stylecheck usages part two: stdlib cleanup (#19338)

* stylecheck usages part two: stdlib cleanup

typeinfo.nim: importCompilerProc => importcompilerproc

nre.nim: newLineFlags => newlineFlags

system.nim: JSRoot => JsRoot

ref #19319

* prefer importCompilerProc

compiler/wordrecg.nim

@@ -41,7 +41,7 @@ type
     wImmediate = "immediate", wConstructor = "constructor", wDestructor = "destructor",
     wDelegator = "delegator", wOverride = "override", wImportCpp = "importcpp",
     wCppNonPod = "cppNonPod",
-    wImportObjC = "importobjc", wImportCompilerProc = "importcompilerproc",
+    wImportObjC = "importobjc", wImportCompilerProc = "importCompilerProc",
     wImportc = "importc", wImportJs = "importjs", wExportc = "exportc", wExportCpp = "exportcpp",
     wExportNims = "exportnims",
     wIncompleteStruct = "incompleteStruct", # deprecated

lib/impure/nre.nim

@@ -281,7 +281,7 @@ proc matchesCrLf(pattern: Regex): bool =
   let newlineFlags = flags and (pcre.NEWLINE_CRLF or
                                 pcre.NEWLINE_ANY or
                                 pcre.NEWLINE_ANYCRLF)
-  if newLineFlags > 0u32:
+  if newlineFlags > 0u32:
     return true
 
   # get flags from build config

lib/pure/os.nim

@@ -2888,7 +2888,7 @@ when defined(nimdoc):
 
 elif defined(nimscript): discard
 elif defined(nodejs):
-  type Argv = object of JSRoot
+  type Argv = object of JsRoot
   let argv {.importjs: "process.argv".} : Argv
   proc len(argv: Argv): int {.importjs: "#.length".}
   proc `[]`(argv: Argv, i: int): cstring {.importjs: "#[#]".}