[Feature Request]: `teal` doesn't warn when teal_data is not verified

### Feature description

App which receives unverified data acts as normal. App user should be warn that the code is not reproducible. What should we do?

- display yellow warning in show R code?
- append warning message in a code or a comment-header?

app

```r
library(teal)

ADSL <- scda::synthetic_cdisc_data("latest")$adsl
ADTTE <- scda::synthetic_cdisc_data("latest")$adtte
ADRS <- scda::synthetic_cdisc_data("latest")$adrs

data <- teal_data(ADSL = ADSL, ADTTE = ADTTE, ADRS = ADRS)

app <- init(
data = data,
modules = list(
example_module()
)
# filter = default_filters
)

runApp(app)
```

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct.

### Contribution Guidelines

- [X] I agree to follow this project's Contribution Guidelines.

### Security Policy

- [X] I agree to follow this project's Security Policy.