Add mods: technic, moreores, paintings, Nyancat (Pbj_pup). Small fix: sandwiches

mods/.cleaner/README.md

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+## Cleaner mod for Luanti
+
+### Description:
+
+A [Luanti (Minetest)][Luanti] mod that can be used to remove/replace unknown entities, nodes, & items. Originally forked from [PilzAdam's ***clean*** mod][f.pilzadam].
+
+![screenshot](screenshot.png)
+
+### Licensing:
+
+- Code: [MIT](LICENSE.txt)
+- Textures: CC0
+
+### Requirements:
+
+- Luanti minimum version: 5.0
+- Depends: none
+
+### Usage:
+
+Registering items, entities, etc. for cleaning can be done in `cleaner.json` in the world directory. If it does not exist it will be created automatically when the server is started.
+
+It is formatted as follows:
+```json
+{
+	"entities" :
+	{
+		"remove" : []
+	},
+	"items" :
+	{
+		"replace" : {}
+	},
+	"nodes" :
+	{
+		"remove" : [],
+		"replace" : {}
+	},
+	"ores" :
+	{
+		"remove" : []
+	}
+}
+```
+
+Cleaning nodes example:
+```json
+{
+	"nodes" :
+	{
+		"remove" : [
+			"old:node_1",
+			"old:node_2",
+		],
+		"replace" : {
+			"old:node_3" : "new:node_1",
+			"old:node_4" : "new:node_2",
+		}
+	},
+}
+```
+
+`remove` key works for nodes, entities, & ores. `replace` key works for nodes & items. Their functions are self-explanatory.
+
+#### Settings:
+
+```
+cleaner.unsafe
+- Enables unsafe methods & commands (remove_ore).
+- type:    bool
+- default: false
+```
+
+### Links:
+
+- [![ContentDB](https://content.luanti.org/packages/AntumDeluge/cleaner/shields/title/)][ContentDB]
+- [Forum](https://forum.luanti.org/viewtopic.php?t=18381)
+- [Git repo](https://github.com/AntumMT/mod-cleaner)
+- [Reference](https://antummt.github.io/mod-cleaner/reference/latest/)
+- [Changelog](changelog.txt)
+- [TODO](TODO.txt)
+
+
+[Luanti]: https://luanti.org/
+[f.pilzadam]: https://forum.luanti.org/viewtopic.php?t=2777
+[ContentDB]: https://content.luanti.org/packages/AntumDeluge/cleaner/