feat: Fixes issue #382: Added support for More-Days week view

[Bonway]

Description

I saw that # 382 is open in Issues, and I have also encountered this issue.
Add multi day view mode on the basis of weekly view

• Modify WeekView to add the daysInView attribute daysInView==7, with the same logic as before, only when daysInView != 7. Enable it to support multi day views
• Modify PageController to slide for multiple days
  
  
  
  

Checklist

• The title of my PR starts with a [Conventional Commit] prefix (fix:, feat:, docs: etc).
• I have followed the [Contributor Guide] when preparing my PR.
• I have updated/added tests for ALL new/updated/fixed functionality.
• I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• I have updated/added relevant examples in examples or docs.

Breaking Change?

• Yes, this PR is a breaking change.
• No, this PR is not a breaking change.

Related Issues

Indicate which issues this PR resolves, if any. For example:
Closes #382

[Bonway]

I have the origin/master branch, but when I automatically analyze it, it always prompts me：fatal: Not a valid object name: 'origin/master'.

[shubham-jitiya-simform]

Hi, @Bonway
Thanks for creating this PR.
In addition to the changes made in this PR can you please check for the header left - right icon mentioned in issue #426.

Currently min/max date is as below which might cause disabling behaviour of buttons when end dates are reached. In the attached screenshot end date is 5th.

flutter: Max date: 275759-01-07 00:00:00.000
flutter: Min date: 1969-12-29 00:00:00.000

Check for showWeekends & startDay properties as well.
On showWeekends = false looks like UI is not consistent.