chore: rename project from go-upkeep to uptop

Module path now gitea.lerkolabs.com/lerko/uptop.
Binary moves to cmd/uptop. All imports, display strings,
CI config, and docs updated.

internal/tui/tab_sites.go

@@ -2,7 +2,7 @@ package tui
 
 import (
 	"fmt"
-	"go-upkeep/internal/models"
+	"gitea.lerkolabs.com/lerko/uptop/internal/models"
 	"net/url"
 	"strconv"
 	"strings"
@@ -340,7 +340,7 @@ func (m Model) viewSitesTab() string {
 			BorderForeground(m.theme.Accent).
 			Padding(1, 3).
 			Render(
-				titleStyle.Render("Go-Upkeep") + "\n\n" +
+				titleStyle.Render("uptop") + "\n\n" +
 					"No monitors configured yet.\n\n" +
 					subtleStyle.Render("[n] Add your first monitor"),
 			)