feat: add timezone support

[stedfn]

Usage:

python3 estimate_epoch_start_time.py --chain_id mainnet --num_future_epochs 10 --num_past_epochs 20 --timezone CET

Example Output

Epoch -1: 13 hours, 19 minutes
Epoch -2: 13 hours, 27 minutes
Epoch -3: 13 hours, 30 minutes
Epoch -4: 13 hours, 29 minutes
Epoch -5: 13 hours, 27 minutes
Epoch -6: 13 hours, 30 minutes
Epoch -7: 13 hours, 20 minutes
Epoch -8: 13 hours, 11 minutes
Epoch -9: 14 hours, 03 minutes
Epoch -10: 14 hours, 10 minutes
Epoch -11: 13 hours, 32 minutes
Epoch -12: 13 hours, 37 minutes
Epoch -13: 14 hours, 07 minutes
Epoch -14: 14 hours, 38 minutes
Epoch -15: 13 hours, 20 minutes
Epoch -16: 13 hours, 42 minutes
Epoch -17: 14 hours, 59 minutes
Epoch -18: 14 hours, 58 minutes
Epoch -19: 13 hours, 22 minutes
Epoch -20: 13 hours, 22 minutes

Exponential weighted average epoch length: 13 hours, 37 minutes
Predicted start of epoch 1: 2024-10-04 22:32:14 CEST+0200 Friday
Predicted start of epoch 2: 2024-10-05 12:09:45 CEST+0200 Saturday
Predicted start of epoch 3: 2024-10-06 01:47:17 CEST+0200 Sunday
Predicted start of epoch 4: 2024-10-06 15:24:48 CEST+0200 Sunday
Predicted start of epoch 5: 2024-10-07 05:02:19 CEST+0200 Monday
Predicted start of epoch 6: 2024-10-07 18:39:50 CEST+0200 Monday
Predicted start of epoch 7: 2024-10-08 08:17:21 CEST+0200 Tuesday
Predicted start of epoch 8: 2024-10-08 21:54:52 CEST+0200 Tuesday
Predicted start of epoch 9: 2024-10-09 11:32:24 CEST+0200 Wednesday
Predicted start of epoch 10: 2024-10-10 01:09:55 CEST+0200 Thursday

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.61%. Comparing base (0aa1343) to head (9bb8a5a).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #12189   +/-   ##
=======================================
  Coverage   71.60%   71.61%           
=======================================
  Files         824      824           
  Lines      165513   165513           
  Branches   165513   165513           
=======================================
+ Hits       118516   118528   +12     
+ Misses      41875    41859   -16     
- Partials     5122     5126    +4     

Flag	Coverage Δ
backward-compatibility	0.17% <ø> (ø)
db-migration	0.17% <ø> (ø)
genesis-check	1.25% <ø> (ø)
integration-tests	38.72% <ø> (+<0.01%)	⬆️
linux	71.40% <ø> (+<0.01%)	⬆️
linux-nightly	71.18% <ø> (-0.01%)	⬇️
macos	54.19% <ø> (+0.08%)	⬆️
pytests	1.57% <ø> (ø)
sanity-checks	1.38% <ø> (ø)
unittests	65.35% <ø> (+<0.01%)	⬆️
upgradability	0.21% <ø> (ø)

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