feat: improve import file to calendar and extend capabilities

[Nir-P]

This is an extension for import to calendar:

what's new?

• Support "Location" field when importing txt, csv or ics files files must be in the following structure or the old structure (without Location)

  Title1, Content1, S_Date1, E_Date1, Location1
  Title2, Content2, S_Date2, E_Date2, Location2
  ...
  TitleN, ContentN, S_DateN, E_DateN, LocationN

• Start and End dates support hours and minutes format

the new rules we set (can be changed through a global variable):

• The location field length is up to 50 characters.
• The event duration limit.

Additional tests added:

• Start date is smaller or equal to the end date.
• The Location field may be empty.
• Checking that new files from the old and new format are working flawlessly.
• And some more here and there :)

[codecov-io]

Codecov Report

Merging #201 (9a4124e) into develop (a1f2998) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #201      +/-   ##
===========================================
+ Coverage    99.36%   99.39%   +0.02%     
===========================================
  Files           36       37       +1     
  Lines         1418     1485      +67     
===========================================
+ Hits          1409     1476      +67     
  Misses           9        9              

Impacted Files	Coverage Δ
app/internal/import_file.py	100.00% <100.00%> (ø)
app/routers/dayview.py	100.00% <0.00%> (ø)
app/internal/quotes/daily_quotes.py
app/internal/quotes/load_quotes.py
app/internal/zodiac.py	100.00% <0.00%> (ø)
app/internal/json_data_loader.py	100.00% <0.00%> (ø)
app/internal/daily_quotes.py	100.00% <0.00%> (ø)
app/database/models.py	96.22% <0.00%> (+0.39%)	:arrow_up:

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