compiler: Reworked Preprocessor To Support Better Error Messages

Can now support showing the trail of includes in an error
message.

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>

Tests/p4rseTests/CliTests/Cli.swift

@@ -43,4 +43,9 @@ func simple_cli_preprocessor_test_file_not_found() -> [String] {
 @CliTest()
 func simple_cli_compilation_error() -> [String] {
     return ["p4ce", "--plain", "compile", "action-parameters-wrong-order.p4", "-I", "TestData/Sources/"]
+}
+
+@CliTest()
+func simple_cli_compilation_error_with_includes() -> [String] {
+    return ["p4ce", "--plain", "compile", "file-loc-error.p4", "-I", "TestData/Sources/"]
 }