feat(#255): Datetime picker doesn't have seconds option

[UseMuse]

#255

added withSeconds option to mtx-calendar and mtx-datetimepicker with default value false (to keep the old behavior for users with the update)

    <!--withSeconds default value - false -->
    <mtx-datetimepicker [withSeconds]="true"...></mtx-datetimepicker>
    <mtx-calendar [withSeconds]="true"...></mtx-calendar>

for MTX_DATETIME_FORMATS added:
for parse and display:
timeWithSecondsInput and datetimeWithSecondsInput

when the user turns on the withSeconds flag
the formatting will be taken from there, if the timeWithSecondsInput and datetimeWithSecondsInput formats are not filled in, the timeInput and datetimeInput formats will be taken and a warning will be displayed in the console that the formats are not filled.
The withSeconds flag is relevant only for the datetime or time type
when enabling the withSeconds flag for other types, the withSeconds flag will be automatically reset to false with a warning in the console

 providers: [
    {
      provide: MTX_DATETIME_FORMATS,
      useValue: {
        parse: {
          dateInput: 'YYYY-MM-DD',
          monthInput: 'MMMM',
          yearInput: 'YYYY',
          timeInput: 'HH:mm',
          timeWithSecondsInput: 'HH:mm:ss',//not required to fill
          datetimeInput: 'YYYY-MM-DD HH:mm',
          datetimeWithSecondsInput: 'YYYY-MM-DD HH:mm:ss',//not required to fill
        },
        display: {
          dateInput: 'YYYY-MM-DD',
          monthInput: 'MMMM',
          yearInput: 'YYYY',
          timeInput: 'HH:mm',
          timeWithSecondsInput: 'HH:mm:ss',//not required to fill
          datetimeInput: 'YYYY-MM-DD HH:mm',
          datetimeWithSecondsInput: 'YYYY-MM-DD HH:mm:ss',//not required to fill
          monthYearLabel: 'YYYY MMMM',
          dateA11yLabel: 'LL',
          monthYearA11yLabel: 'MMMM YYYY',
          popupHeaderDateLabel: 'MMM DD, ddd',
        },
      },
    },

please accept the contribution, since the work has already been done, and I saw the message that the contribution to v15 is not accepted when I finished the work

record.2025-04-26.220513.mp4