chore(rename): module gitea.d-ma.be → git.d-ma.be/mathias/gitea-mcp (#39)

Gitea host renamed (infra ADR-0004); the mcp-chassis dep already migrated
(3329ff3), so the sequencing gate is clear. `go mod edit -module` + bulk import
rewrite across all .go files. gitea-mcp is a server binary (not an imported
library), so no downstream consumers break. build + task check green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/tools/issue_list.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"encoding/json"
 
-	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
-	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
-	"gitea.d-ma.be/mathias/gitea-mcp/internal/registry"
+	"git.d-ma.be/mathias/gitea-mcp/internal/allowlist"
+	"git.d-ma.be/mathias/gitea-mcp/internal/gitea"
+	"git.d-ma.be/mathias/gitea-mcp/internal/registry"
 )
 
 type IssueList struct {