feat(misc): add /giaxang Petrolimex retail fuel prices

internal/modules/misc/misc.go

@@ -2,8 +2,9 @@
 // /ping (public, exercises KV write), /ping_stats (protected, exercises KV
 // read), /random (public random picker), /wheelofnames (public wheel picker
 // with optional GIF), /ff (protected give-up-on-T1 rant), /xlt1 (public
-// apologise-to-T1 petition, the sequel to /ff), /the_answer (private easter
-// egg), and small public disclaimer commands.
+// apologise-to-T1 petition, the sequel to /ff), /giaxang (public Petrolimex
+// retail fuel prices), /the_answer (private easter egg), and small public
+// disclaimer commands.
 package misc
 
 import (
@@ -57,6 +58,7 @@ func New(deps modules.Deps) modules.Module {
 			wheelOfNamesCommand(),
 			ffCommand(),
 			xlt1Command(),
+			giaxangCommand(),
 			theAnswerCommand(),
 			disclaimerCommand("trongtruonghop", "Phát biểu disclaimer mặc định", defaultTarget, true),
 			disclaimerCommand("tth", "Phát biểu disclaimer mặc định", defaultTarget, true),