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/app.go

@@ -1,5 +1,5 @@
 // Package web implements the HTTP server: routing, session middleware,
-// template rendering, and all page/API handlers for inventree.
+// template rendering, and all page/API handlers for vibetree.
 package web
 
 import (
@@ -9,13 +9,13 @@ import (
 	"net/http"
 	"time"
 
-	"inventree/internal/assets"
-	"inventree/internal/auth"
-	"inventree/internal/folders"
-	"inventree/internal/itemtypes"
-	"inventree/internal/settings"
-	"inventree/internal/statuses"
-	"inventree/internal/users"
+	"vibetree/internal/assets"
+	"vibetree/internal/auth"
+	"vibetree/internal/folders"
+	"vibetree/internal/itemtypes"
+	"vibetree/internal/settings"
+	"vibetree/internal/statuses"
+	"vibetree/internal/users"
 )
 
 // App holds every dependency HTTP handlers need: data stores, templates, and