Add timer programming feature

[milkboy]

Relates to https://github.com/robinostlund/homeassistant-volkswagencarnet/issues/352

WIP

A little bit of a placeholder still, but goal is to implement some functionality for timer programming etc.

Some data is probably different, if there is an aux heater or something attached, so will probably ask for volunteers to provide API responses at some point :wink:

Timers

• [X] enable/disable departure timers (implemented as switches for now)
• [x] edit departure time
• [x] change location for timer (wishlist)
• [x] edit timer schedule: singe with exact datetime or cyclic with weekday mask and time

Misc settings

• [x] change min charge limit

Locations (wishlist)

The whole departure schedule request is sent on each call to the backend, so including any changes to the charging profiles will update them also

• [X] edit target charge level
• [X] charge/clima/both
• [X] set max charge current
• [X] enable/disable "off-peak"
• [X] set "off-peak" times

[codecov-commenter]

Codecov Report

Merging #179 (6535ede) into master (1991b21) will increase coverage by 3.58%. The diff coverage is 54.57%.

@@            Coverage Diff             @@
##           master     #179      +/-   ##
==========================================
+ Coverage   36.22%   39.80%   +3.58%     
==========================================
  Files           6        7       +1     
  Lines        2504     2733     +229     
  Branches      432      469      +37     
==========================================
+ Hits          907     1088     +181     
- Misses       1540     1578      +38     
- Partials       57       67      +10     

Flag	Coverage Δ
unittests	39.80% <54.57%> (+3.58%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
volkswagencarnet/vw_vehicle.py	45.24% <33.02%> (+2.99%)	:arrow_up:
volkswagencarnet/vw_connection.py	12.78% <37.20%> (+0.18%)	:arrow_up:
volkswagencarnet/vw_dashboard.py	56.77% <55.26%> (+0.30%)	:arrow_up:
volkswagencarnet/vw_timer.py	72.41% <72.41%> (ø)
volkswagencarnet/vw_utilities.py	94.02% <86.66%> (-2.13%)	:arrow_down:

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[JBoye]

Looks very nice! Let us know when you have something to test 👍

[milkboy]

Looks very nice! Let us know when you have something to test +1

Sure. Quite a few wrinkles to iron out still before it's "production" ready though :wink: