Feature: enable excluding file from backup

[pejota14]

Feature Request

Enable excluding file from backup.

Plugin

capacitor-filesystem

Description

This is a feature that is a good practice for directories like DATA, for files that are redownloable. Only implementation for iOS. https://developer.apple.com/documentation/foundation/urlresourcevalues/isexcludedfrombackup

For Android, it can be made at project level, with something like android/app/src/main/res/xml/backup_rules.xml:

<?xml version="1.0" encoding="utf-8"?>
<full-backup-content>
    <exclude domain="file" path="audio/"/>
</full-backup-content>

And on AndroidManifest.xml:

<application
    android:allowBackup="true"
    android:fullBackupContent="@xml/backup_rules"
    ...>

Not needed implementation for web.

Platform(s)

iOS

Preferred Solution

I opened a PR with my solution.

Not sure if it's interesting to add the info about Android.

Alternatives

Additional Context

[pejota14]

Can this be considered prior to moving to next major? @OS-pedrogustavobilro