Search and replace

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**Is your feature request related to a problem? Please describe.**
A way to easy replace a tile (or tiles) by another. This feature does not exist at all.

**Describe the solution you'd like**
- you choose a source tile from any tileset
- you choose the layers from the tilemap to search through
- you can choose 'search' which shows on the map (with border) where the tiles are located (and the count).this to have an idea what will be replaced
- you can choose 'search and replace' which allows to choose a destination( replacement) tile which will replace the source tiles

I don't know if multiple tilesets can be used for source and/or destination. But all properties of a tile like collisions, ... Should be cloned in the destination tile.

This feature lets you edit existing maps quickly.
The feature could be expanded by allowing multiple source -> destinations operations happening after each other by entering a queue of them. An even more: queues could be saved to a file to load and apply to many maps (using the same tilesets).
In this way you could run replacement 'batches' on your maps to edit them in the same way.

No files, tests, or entry points are named in the issue. Review the requested search, preview, and replacement workflow first; done would mean replacing selected source tiles across chosen layers while preserving tile properties, with the optional batching ideas clarified.

Written by the indexing model from the issue text.