Intro / Welcome

### Problem to solve

Some people do visiting the catalog do not understand what this is all about.

### Proposal

Show a dialog with Slides to give orientation and clearness.
- Highlighting the community approach to data/documented apps
- Diversity that map apps can offer
- Show options to get in contact with the community: present communication channels, weekly osm, community events, user blogs ... adapted to user filter eg. https://osmcal.org/?in=Switzerland, https://osmcal.org/static/api.html)

- At the end of every slide: [Tell me more] [Jump into the Catalog]

#### Possible Slides

### Links / references / screenshots

- https://wiki.openstreetmap.org/wiki/Etiquette

The issue does not identify any files, tests, or entry points. Start by locating the catalog's introductory or dialog UI, then review the proposed slide content and navigation requirements; done means a welcome dialog presents the orientation slides and lets users learn more or enter the catalog.

Written by the indexing model from the issue text.