implementing bio-metric

[maifeeulasad]

as per #52

I've started implementing bio-metric in my fork, in a specific feature branch.

Current progress can be seen here : https://github.com/maifeeulasad/Expenso/tree/0f4ddfab7244626677f3b39a6871b9df0e793f9c

Using androidx.biometric:biometric:1.2.0-alpha03

Now need to create to a settings menu, to enable/disable this feature

[maifeeulasad]

@Spikeysanju how should i store this(this feature enabled or disabled) data.

Should I simply use sharedpref or create repo(i think this will be unnecessary)?

[Spikeysanju]

@maifeeulasad Shall we use DataStore for this?.. Currently we're already using DataStore for storing Day/Night Mode.

I think that will be perfect for this feature. Feel free to leave your thoughts on this 👍

[maifeeulasad]

@Spikeysanju I've used DataStore and tried to follow the project structure as much as possible.

And here is the pull : #59

Let me know if it needs any modifications or something.