DS3231 Alarm features (#805)

* Added alarm features
* more functions
* chore: fix typo
* feat(ds3231): add Alarm2Mode type and mode consts
* docs(ds3231): add docstrings for SQW functions
* feat(ds3231): add methods for Alarm2
* fix(ds3231): use Alarm2Mode for SetAlarm2 method
* docs(ds3231): add example for alarms
* docs(ds3231): refactor alarms example
* make main function more concise to avoid llvm error for pico
* ci(ds3231): split basic and alarm tests
* style(ds3231): reorder private funcs to the bottom
* docs(ds3231): add docstring for alarm modes
* docs(ds3231): make alarm docstrings more descriptive
* chore(ds3231): fix typo in docstring
* style(ds3231): reorder public functions
* style(ds3231): reorder private methods
* chore(ds3231): add missing error handling
* feat(ds3231): use setter funcs for en/disabling instead of separate funcs
* fix(ds3231): correctly enable alarms in example
* style(ds3231): rename SetEnable32K to SetEnabled32K for consistency
* refactor(ds3231): replace legacy with regmap package
* refactor(ds3231): use Write32 instead of Tx for SetAlarm1
* chore(ds3231): remove fmt deps and and use println in examples
* refactor(ds3231): read temperature as uint16

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Co-authored-by: Matthias Fulz <mfulz@olznet.de>

Author: gKits