feat: add delete account feature

[guillermomachado]

What does this do?

Adds delete account feature.

Why did you do this?

To complain with the App Stores we need to allow users to delete their account. This feature will enable users to do it from the settings screen.

How did you test this?

1. Create a user.
2. Navigate to the Settings screen and press delete.
3. Confirm the deletion.
4. Try to log in again with the same credentials.

Simulator.Screen.Recording.-.iPhone.SE.3rd.generation.-.2025-01-17.at.12.51.46.mp4

[github-actions]

💯 Test Coverage

Lines	Statements	Branches	Functions
	51.35% (340/662)	43.58% (119/273)	37.16% (84/226)

😎 Tests Results

Tests	Skipped	Failures	Errors	Time
75	0 💤	0 ❌	0 🔥	31.741s ⏱️

👀 Tests Details • (51%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	51.35	43.58	37.16	51.8
api/auth	0	100	0	0
use-user.tsx	0	100	0	0	17–37
app/(app)	0	0	0	0
settings.tsx	0	0	0	0	20–39
components/settings	0	0	0	0
delete-account-item.tsx	0	100	0	0	12–32
item.tsx	0	0	0	0	14–17