Changes

Fix typo

[ci skip]

Add time utilities

Move getTime from System to Internal package and introduce a new package Time with function getTime returning a record.

Add leap year utility functions

Rename TimeType components

Add day of week computation

Let dayOfWeek return Integer in range [1, 7]

Add function Strings.contains

Add function to round to nearest integer

Add arrays for month and day names (full and abbreviated)

Integrate DateTime record from Testing lib

... with all dependencies on Testing and DymolaModels removed

Integrate Duration record from Testing lib

... with all dependencies on Testing and DymolaModels removed

Rename variables in DateTime (s -> second, ...)

Rename seconds to totalSeconds in Duration

Rename variables in Duration (s -> seconds, ...)

Support '-' for DateTime

Add DateTime.now()

Add tests for Duration

Add tests for DateTime

Format DateTime like strftime in C++ and Python

... but currently using only a subset of the available formatting options.

Align string formatting for Duration with DateTime

Add class comments to DateTime and all its operators

Add class comments to Duration and all its operators

Use dt as variable name for DateTimes

Use d as variable name for Durations

.... and make an update regarding DateTimes as dt in Duration as well

Add basic doc for DateTime

Add basic doc for Duration

Update .mailmap file

Fix lookup of package constant

Fix HTML tags and double quotes

Can use Modelica.Math.nearestInteger

Remove TimeType in favor of DateTime

Fix icon inheritance

Rewrite using external functions from ModelicaTime.c

* Rewrite DateTime.'constructor'.fromEpoch to utilize ModelicaTime_localtime
* Rewrite DateTime.'String'.formatted to utilize ModelicaTime_strftime
* Rewrite DateTime.epoch to utilize ModelicaTime_difftime
* Add DateTime.'constructor'.fromString utilizing ModelicaTime_strptime

ModelicaTime.[ch] need to be integrated to ModelicaExternalC for later distribution. During development ModelicaTime.c is directly included by the external function declaration.