moved palletes and templates into categories in extra

extra/templates/apps/telegram/readme.md

@@ -0,0 +1,17 @@
+# Telegram
+
+1. Download the [template file](telegram.tdesktop-theme)
+
+2. Configure the template in `~/.config/clrsync/config.toml`:
+
+```toml
+[templates.telegram]
+enabled = true
+input_path = '~/.config/clrsync/templates/telegram.tdesktop-theme'
+output_path = '~/clrsync.tdesktop-theme'
+reload_cmd = ''
+```
+
+3. Apply the palette with clrsync and send the generated `clrsync.tdesktop-theme` file to yourself in Telegram
+
+4. Click on the theme file in the Telegram dialog to apply it