184 feature request add teal app showcasing tealmodulesbsafe

[Xyarz]

Added the bsafe app as discussed with Dony. Had to adjust some minor parts as we don't have images for the application yet.

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[Xyarz]

I have read the CLA Document and I hereby sign the CLA

[vedhav]

Thank you for the PR @Xyarz
When I tried to run this app I was unsuccessful. I am using the teal and related packages from the main branch, you can easily install them by getting them from pharmaverse r-universe. I think the package needs some updates to use the latest version of teal.

Can you please raise another PR by taking a branch from the dev instead of the main branch. Because, this app cannot be merged to the main branch without the CRAN release of bsafe and teal.modules.bsafe.
Both these branches are detached from each other so we do a manual merge of dev into main after a release cycle of the packages.