Enhance text import to use fixed timestamps

[NeoCoderMatrix86]

Tasks:

• [x] Implement import data model which is currrently related to the internal data model
• [x] Move import to work with the new data model
• [x] Add a field like "Track.StartDateTime" to the import data model
• [x] Implement mapping of fields from import to internal data model

Is your feature request related to a problem? Please describe. Some applications write text files with their tracks with fixed moments, when the track was played.

For example:

Maksim Dark~Algorithm~02.07.2024 19:27:18
Deniz Bul~This Is It~02.07.2024 19:33:54
Boris Brejcha~In Memory of Love (Remastered)~02.07.2024 19:40:46
Sam Paganini & Johnny Kaos~Touch Me (Original Mix)~02.07.2024 19:47:05
David Phoenix~Side Effects (Original Mix)~02.07.2024 19:54:27
Horisone~Momentum~02.07.2024 19:58:43
Julian Jeweil~Mars~02.07.2024 20:03:38
Metodi Hristov~Sci-Fi~02.07.2024 20:08:35
Alex Stein~Headrush (Original Mix)~02.07.2024 20:13:51
Raxon~Dream Space~02.07.2024 20:18:41
Simon Stiglmeier~Slide (Original Mix)~02.07.2024 20:24:51
Woo York~Rainforest Mystery~02.07.2024 20:29:18
Timmo~Acid Circus~02.07.2024 20:35:08
Heerhorst~Dada~02.07.2024 20:39:54
Secret Cinema & Sama~Diviner~02.07.2024 20:45:22
Anti-Slam & W.E.A.P.O.N.~Rupture~02.07.2024 20:52:06
SQNCR69~180409C~02.07.2024 20:59:26
Julian Jeweil~Dorsal~02.07.2024 21:03:40
Ramon Tapia~Sonic Therapy~02.07.2024 21:07:51
John Summit~In Chicago (Danny Avila Extended Remix)~02.07.2024 21:13:39
Jay Lumen~Galactic Rainbow~02.07.2024 21:18:30
Julian Jeweil~Internal~02.07.2024 21:24:50
Superstrobe~Freakin Out (Original Mix)~02.07.2024 21:29:49
Bendtsen~Savage~02.07.2024 21:35:07
Julian Ess & Robert Vasilev~Space Redemption~02.07.2024 21:40:39
Tiesto~Lethal Industry (Maddix Extended Remix)~02.07.2024 21:45:47
Tiger Stripes~Rocket (Original Mix)~02.07.2024 21:49:24
Martin Kinrus~Network~02.07.2024 21:54:39

Describe the solution you'd like Add fields for start datetime that can be read out.

The import scheme for tracks should be like this: (?'Track.Artist'[a-zA-Z0-9_ .();äöü&:,'*-?:]{1,})~(?'Track.Title'[a-zA-Z0-9_ .();äöü&'*-?:]{1,})~(?'Track.StartDateTime'.{1,})

[NeoCoderMatrix86]

We should implement an import model, where this values can be collected and then be transformed to the internal data model.