Use format `yyyyMMdd_HHmmss` for current date

[MrChocolatine]

What is it?

• [ ] Bugfix
• [X] Feature
• [x] Codebase improvement

Description of the changes in your PR

Use format yyyyMMdd_HHmmss for current date.

This change is a partial effort towards:

• https://github.com/FossifyOrg/Contacts/issues/89
• FossifyOrg/General-Discussion#129

Fixes the following issue(s)

Prefix issues with "Fixes FossifyOrg/AppRepo" so that GitHub closes them when this PR is merged (note that each "Fixes #" should be in its own item). For Commons, it should always be in a format like "Fixes FossifyOrg/AppRepo#123" -->

• Fixes FossifyOrg/General-Discussion/issues/129

Acknowledgement

• [x] I read the contribution guidelines.

[MrChocolatine]

Hello

[naveensingh]

Thanks but you shouldn't work on an issue until needs triage label is removed. It may not always get accepted.

[RustoMCSpit]

hi all, why was a format without distinction between datapoints selected? i use the 2025_01_15_14_43_23 as thats what the voice recorder has shipped for years now. i know youre "homogenising" and all but can you have an "archaic" dropdown or something. ive been using this file format for so long now and everything i have is organised in it.

[RustoMCSpit]

the below is what is currently used

    val simpleDateFormat = 
SimpleDateFormat("yyyyMMdd_HHmmss", 
Locale.getDefault())

the below is a second option i would like added, it is the exact same but it adds underscores between ALL points rather than just date and time

    val simpleSeparatedDateFormat = 
SimpleDateFormat("yyyy_MM_dd_HH_mm_ss", 
Locale.getDefault())

the below is a different variation of the second option that could be added though i have no need for it, it is the exact same but it separates time and date with a '-'

    val separatedDateFormat = 
SimpleDateFormat("yyyy_MM_dd-HH_mm_ss", 
Locale.getDefault())