Remove all mentions of "buckets" from the documentation

[Freddyminu]

Overview

The term "bucket" is no longer used in TagoIO. Devices and their data storage are no longer separated by buckets — the concept has been deprecated and the terminology should be fully removed from all documentation pages.

Tasks

• Search all documentation pages for any mention of "bucket", "buckets", or "bucket-related" terminology
• Update or rewrite affected sections to use the correct current terminology (device data, device storage, etc.)
• Ensure no code examples, API references, or diagrams reference buckets
• Check and update any navigation labels, page titles, or metadata that reference buckets

Additional context

• This is a terminology cleanup — the underlying concept (device data storage) still exists, it just no longer has a separate "bucket" abstraction
• Any external links or anchors that referenced bucket-specific pages should be reviewed for redirects
• Related: issue Improve docs for advanced features (NodeJS API queries, multi-bucket blueprint dashboards) #65 references "multi-bucket" in its title and may need to be updated as well

[Freddyminu]

Issue requested by @vitorfdl