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/render.go

@@ -10,7 +10,7 @@ import (
 	"strings"
 	"time"
 
-	content "inventree/web"
+	content "vibetree/web"
 )
 
 // templateFuncs are available to every template (pages and fragments).
@@ -101,9 +101,9 @@ func loadTemplates(a *App) (*templateSet, error) {
 	// used by layout.html for the <title> and navbar brand text.
 	appFuncs := template.FuncMap{
 		"siteName": func() string {
-			name, err := a.Settings.Get(context.Background(), "site_name", "inventree")
+			name, err := a.Settings.Get(context.Background(), "site_name", "vibetree")
 			if err != nil || name == "" {
-				return "inventree"
+				return "vibetree"
 			}
 			return name
 		},