Rename project from inventree to vibetree

- go.mod module path (and every internal/vibetree import) inventree -> vibetree
- cmd/inventree/ -> cmd/vibetree/, deploy/inventree.service -> vibetree.service
- Default site name (seed data + the siteName template func's fallback)
  is now "vibetree", shown in the navbar, <title>, and login page
- Session cookie renamed inventree_session -> vibetree_session
- Default DB path data/inventree.db -> data/vibetree.db, CLI/log text,
  Dockerfile, docker-compose.yml, README, .gitignore/.dockerignore all
  updated to match

Existing installs: this changes the session cookie name (users will be
signed out once) and the default DB filename (point -db at your existing
file, or rename it, to keep your data).

internal/web/web_test.go

@@ -11,9 +11,9 @@ import (
 	"strings"
 	"testing"
 
-	"inventree/internal/database"
-	"inventree/internal/models"
-	"inventree/internal/web"
+	"vibetree/internal/database"
+	"vibetree/internal/models"
+	"vibetree/internal/web"
 )
 
 func testApp(t *testing.T) *web.App {
@@ -49,7 +49,7 @@ func loginAs(t *testing.T, srv *httptest.Server, username, password string) *htt
 		t.Fatalf("expected redirect on login, got %d", res.StatusCode)
 	}
 	for _, c := range res.Cookies() {
-		if c.Name == "inventree_session" {
+		if c.Name == "vibetree_session" {
 			return c
 		}
 	}