feat: color palette for calendar (#118)

* feat: work on the palette

* feat: palette basically done?

* fix: lint warnings and errors

* fix: minor fixes

* fix: color patch colors and shades

* fix: prettier issue

* chore: use TS satisfies

* chore: remove eslint-disable comment

---------

Co-authored-by: doprz <52579214+doprz@users.noreply.github.com>

src/stories/components/CourseCellColorPicker.stories.tsx

@@ -0,0 +1,19 @@
+import type { Meta, StoryObj } from '@storybook/react';
+import CourseCellColorPicker from '@views/components/common/CourseCellColorPicker/CourseCellColorPicker';
+import React, { useState } from 'react';
+import type { ThemeColor } from 'src/shared/util/themeColors';
+
+const meta = {
+    title: 'Components/Common/CourseCellColorPicker',
+    component: CourseCellColorPicker,
+} satisfies Meta<typeof CourseCellColorPicker>;
+
+export default meta;
+type Story = StoryObj<typeof CourseCellColorPicker>;
+
+export const Default: Story = {
+    render: () => {
+        const [selectedColor, setSelectedColor] = useState<ThemeColor | null>(null);
+        return <CourseCellColorPicker setSelectedColor={setSelectedColor} />;
+    },
+};