Pyhafas

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* fix: regional trains type in KVB profile

Internal changes:

* fix: disable DB requests tests
DB disabled their HaFAS

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* feat: implement nearby request
* fix: parsing station board results without a direction in base profile
* fix: support additional TRSF leg type equivalent to walking in base profile
This fixes VVV profile.
* fix: fix journeys request in nasa and base profile

Internal changes:

* fix(testing): fix parsing test execution on windows
* fix(testing): long-term fix for journey request tests.
* feat(testing): execute tests in GitHub CI

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* [feature] Add VVV Profile
* [feature] Add NVV Profile
* [fix] Typo in KVB Profile

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* [feature] Parse leg remarks
* [feature] Add KVB Profile
* [feature] Add optional retry parameter for requests. You might activate retries with the `activate_retry()` function on your profile

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* [BUG] Fix setting of default user agent

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* [FEATURE] Add timezone awareness to all datetime time objects
* [FEATURE] Allow filtering at :func:`pyhafas.client.HafasClient.departures` and :func:`pyhafas.client.HafasClient.arrivals` for direction station
* [FEATURE] Add option to :func:`pyhafas.client.HafasClient.journeys` request to allow setting a maximum number of returned journeys
* [BUG] Fix bug with some HaFAS versions in platform parsing
* [BUG] Changed coordinate type from int to float
* Better dependency requirements (less specific versions)
* Add tests