v: move cmd/v/help/ to vlib/v/help, to simplify the interaction between module lookup & v recompilation (#16867)

cmd/tools/modules/vhelp/vhelp.v

@@ -5,7 +5,7 @@ import os
 pub fn show_topic(topic string) {
 	vexe := os.real_path(os.getenv('VEXE'))
 	vroot := os.dir(vexe)
-	target_topic := os.join_path(vroot, 'cmd', 'v', 'help', '${topic}.txt')
+	target_topic := os.join_path(vroot, 'vlib', 'v', 'help', '${topic}.txt')
 	content := os.read_file(target_topic) or {
 		eprintln('Unknown topic: ${topic}')
 		exit(1)

cmd/v/v.v

@@ -3,9 +3,9 @@
 // that can be found in the LICENSE file.
 module main
 
-import help
 import os
 import term
+import v.help
 import v.pref
 import v.util
 import v.util.version

vlib/v/help/help.v

@@ -11,7 +11,7 @@ const (
 pub fn print_and_exit(topic string) {
 	vexe := pref.vexe_path()
 	vroot := os.dir(vexe)
-	topicdir := os.join_path(vroot, 'cmd', 'v', 'help')
+	topicdir := os.join_path(vroot, 'vlib', 'v', 'help')
 
 	for b in topic {
 		if (b >= `a` && b <= `z`) || b == `-` || (b >= `0` && b <= `9`) {