chore: migrate module path from git.t-juice.club to code.t-juice.club

Update Go module path and all import references for Gitea to Forgejo
host migration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

go.mod

@@ -1,8 +1,9 @@
-module git.t-juice.club/torjus/labmcp
+module code.t-juice.club/torjus/labmcp
 
 go 1.24
 
 require (
+	github.com/go-git/go-git/v5 v5.16.4
 	github.com/lib/pq v1.10.9
 	github.com/urfave/cli/v2 v2.27.5
 	modernc.org/sqlite v1.34.4
@@ -19,7 +20,6 @@ require (
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
 	github.com/go-git/go-billy/v5 v5.6.2 // indirect
-	github.com/go-git/go-git/v5 v5.16.4 // indirect
 	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect