add theme for posting

.config/posting/themes/catppuccin_latte.yml

@@ -0,0 +1,26 @@
+name: Catppuccin
+primary: '#8839ef'
+secondary: '#40a02b'
+accent: '#7287fd'
+background: '#eff1f5'
+surface: '#ccd0da'
+error: '#d20f39'
+success: '#40a02b'
+warning: '#df8e1d'
+
+text_area:
+  gutter: 'bold #b4befe'
+  matched_bracket: 'white on #8839ef'
+url:
+  base: 'italic #1e66f5'
+  protocol: 'bold #40a02b'
+syntax:
+  json_key: 'italic #1e66f5'
+  json_number: '#fe640b'
+  json_string: '#40a02b'
+  json_boolean: '#8839ef'
+  json_null: 'underline #8839ef'
+
+author: Thomas Philippot
+description: A soothing pastel theme for the high-spirited!
+homepage: https://github.com/catppuccin/catppuccin