refact!: prepare for transfer

apply @sgoudham's suggestions
ref https://github.com/catppuccin/catppuccin/issues/2696#issuecomment-2707252468

changes:
- removed every styling outside of the colors themselves (i.e. rounding,
  `text-shadow` & `padding`)
- changed the default accent color to `mauve`
- renamed flavour CSS filenames from `<f>.css` to `catppuccin-<f>.css`

Signed-off-by: Adam Perkowski <adas1per@protonmail.com>

themes/catppuccin-frappe.css

@@ -0,0 +1,25 @@
+:root {
+  --rosewater: #f2d5cf;
+  --flamingo: #eebebe;
+  --pink: #f4b8e4;
+  --mauve: #ca9ee6;
+  --red: #e78284;
+  --maroon: #ea999c;
+  --peach: #ef9f76;
+  --yellow: #e5c890;
+  --green: #a6d189;
+  --teal: #81c8be;
+  --sky: #99d1db;
+  --sapphire: #85c1dc;
+  --blue: #8caaee;
+  --lavender: #babbf1;
+
+  --main-color: var(--mauve);
+  --main-background: #303446;
+  --second-background: #292c3c;
+  --hover-background: #414559;
+  --main-text: #c6d0f5;
+  --dimmer-text: #949cbb;
+  --green-color: var(--green);
+  --red-color: var(--red);
+}