Move qbittorrent constants to const.py

[chrisx8]

Proposed change

Move constants used by the qbittorrent integration from sensors.py to consts.py

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
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Additional information

• This PR fixes or closes issue: N/A
• This PR is related to issue: Add config flow to qBittorrent #82560
• Link to documentation pull request: N/A

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[home-assistant]

Hey there @geoffreylagaisse, mind taking a look at this pull request as it has been labeled with an integration (qbittorrent) you are listed as a code owner for? Thanks!

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[epenet]

Separate note (for another PR): whilst looking at the use of the constants, I stumbled on format_speed and I think that should be dropped and adjusted in favor of suggested_unit_of_measurement/suggested_display_precision on the entity descriptions.

Separate note 2 (for yet another PR): I think the current_status sensor should be adjusted to use device_class ENUM to enable translations

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[epenet]

LGTM 👍