Add doc pages for remaining raco commands

Closes PR 12956

collects/scribblings/raco/docs.scrbl

@@ -0,0 +1,14 @@
+#lang scribble/doc
+@(require scribble/manual "common.rkt")
+
+@title[#:tag "docs"]{@exec{raco docs}: Documentation Search}
+
+The @exec{raco docs} command searches the documentation for
+the given identifiers or search terms.
+
+Command-line flags:
+
+@itemlist[
+  @item{@Flag{h} or @DFlag{help} --- show help information for this command}
+  @item{@DFlag{} --- do not treat remaining arguments as switches}
+]

collects/scribblings/raco/expand.scrbl

@@ -0,0 +1,15 @@
+#lang scribble/doc
+@(require scribble/manual "common.rkt"
+          (for-label racket/base))
+
+@title[#:tag "expand"]{@exec{raco expand}: Macro Expansion}
+
+The @exec{raco expand} command macro expands the contents of
+the given source files. Also see @racket[expand].
+
+Command-line flags:
+
+@itemlist[
+  @item{@Flag{h} or @DFlag{help} --- show help information for this command}
+  @item{@DFlag{} --- do not treat remaining arguments as switches}
+]

collects/scribblings/raco/pkg.scrbl

@@ -0,0 +1,8 @@
+#lang scribble/doc
+@(require scribble/manual "common.rkt")
+
+@title[#:tag "pkg"]{@exec{raco pkg}: Planet 2 Package Management}
+
+See @other-manual['(lib "planet2/scribblings/planet2.scrbl")] for
+information on the @exec{raco pkg} command, which is used for
+managing external code packages with Planet 2.

collects/scribblings/raco/raco.scrbl

@@ -22,9 +22,13 @@ a typical Racket installation.
 @include-section["plt.scrbl"]
 @include-section["unpack.scrbl"]
 @include-section["planet.scrbl"]
+@include-section["pkg.scrbl"]
 @include-section["setup.scrbl"]
 @include-section["decompile.scrbl"]
 @include-section["demod.scrbl"]
 @include-section["ctool.scrbl"]
 @include-section["test.scrbl"]
+@include-section["docs.scrbl"]
+@include-section["expand.scrbl"]
+@include-section["scribble.scrbl"]
 @include-section["command.scrbl"]

collects/scribblings/raco/scribble.scrbl

@@ -0,0 +1,8 @@
+#lang scribble/doc
+@(require scribble/manual "common.rkt")
+
+@title[#:tag "scribble"]{@exec{raco scribble}: Building Documentation}
+
+See @other-manual['(lib "scribblings/scribble/scribble.scrbl")]
+for information on the @exec{raco scribble} command, which is used to
+run and render a Scribble document.