reorganize into core plus packages

The "racket" directory contains a pared-back version of the
repository, roughly.

The "pkgs" directory everything else in the repository, but
organized into packages.

original commit: b2ebb0a28bf8136e75cd98316c22fe54c30eacb2

pkgs/parser-tools-pkgs/parser-tools-doc/info.rkt

@@ -1,2 +1 @@
 #lang setup/infotab
-

pkgs/parser-tools-pkgs/parser-tools-doc/parser-tools/info.rkt

@@ -1,5 +1,3 @@
 #lang setup/infotab
 
-(define compile-omit-paths '("private-lex/error-tests.rkt"))
-
 (define scribblings '(("parser-tools.scrbl" (multi-page) (parsing-library))))

pkgs/parser-tools-pkgs/parser-tools-lib/info.rkt

@@ -0,0 +1 @@
+#lang setup/infotab

pkgs/parser-tools-pkgs/parser-tools-lib/parser-tools/info.rkt

@@ -0,0 +1,3 @@
+#lang setup/infotab
+
+(define compile-omit-paths '("private-lex/error-tests.rkt"))

pkgs/parser-tools-pkgs/parser-tools/info.rkt

@@ -0,0 +1,4 @@
+#lang setup/infotab
+
+(define deps '("parser-tools-lib"
+               "parser-tools-doc"))