chore: Update to ngx-bootstrap 12.0.0

[michael-wisely-gravwell]

npm clean-install was failing for me on development due to an issue resolving ngx-bootstrap

npm error While resolving: ngx-bootstrap@11.0.2
npm error Found: @angular/animations@17.0.4
npm error node_modules/@angular/animations
npm error   dev @angular/animations@"17.0.4" from the root project
npm error   peerOptional @angular/animations@"17.0.4" from @angular/platform-browser@17.0.4
npm error   node_modules/@angular/platform-browser
npm error     dev @angular/platform-browser@"17.0.4" from the root project
npm error     peer @angular/platform-browser@"17.0.4" from @angular/forms@17.0.4
npm error     node_modules/@angular/forms
npm error       dev @angular/forms@"17.0.4" from the root project
npm error     1 more (@angular/platform-browser-dynamic)

This PR proposes upgrading to ngx-boostrap@12.0.0, which is compatible with Angular 17.

With the proposed changes, npm clean-install appears to complete without failure.