feat: flag widget (#6047)

This PR adds the flag widget:

<img width="333" alt="Skjermbilde 2024-01-26 kl 14 16 19"
src="https://github.com/Unleash/unleash/assets/16081982/57b8c312-fcd5-4a3f-85f7-76514c671912">

frontend/src/component/executiveDashboard/ExecutiveDashboard.tsx

@@ -5,6 +5,7 @@ import { UsersChart } from './UsersChart/UsersChart';
 import { FlagsChart } from './FlagsChart/FlagsChart';
 import { useExecutiveDashboard } from 'hooks/api/getters/useExecutiveSummary/useExecutiveSummary';
 import { UserStats } from './UserStats/UserStats';
+import { FlagStats } from './FlagStats/FlagStats';
 
 const StyledGrid = styled(Box)(({ theme }) => ({
     display: 'grid',
@@ -29,6 +30,7 @@ export const ExecutiveDashboard: VFC = () => {
             </Box>
             <StyledGrid>
                 <UserStats />
+                <FlagStats />
                 <UsersChart
                     userTrends={executiveDashboardData?.userTrends ?? []}
                 />

frontend/src/component/executiveDashboard/FlagStats/FlagStats.tsx

@@ -0,0 +1,123 @@
+import { Settings } from '@mui/icons-material';
+import { Box, Typography, styled } from '@mui/material';
+import { HelpIcon } from 'component/common/HelpIcon/HelpIcon';
+
+const StyledContent = styled(Box)(({ theme }) => ({
+    borderRadius: `${theme.shape.borderRadiusLarge}px`,
+    backgroundColor: theme.palette.background.paper,
+    maxWidth: 300,
+    padding: theme.spacing(3),
+}));
+
+const StyledHeader = styled(Typography)(({ theme }) => ({
+    marginBottom: theme.spacing(3),
+    fontSize: theme.fontSizes.bodySize,
+    fontWeight: 'bold',
+    display: 'flex',
+    alignItems: 'center',
+}));
+
+const StyledRingContainer = styled(Box)(({ theme }) => ({
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+}));
+
+const StyledRing = styled(Box)(({ theme }) => ({
+    borderRadius: '50%',
+    width: '200px',
+    height: '200px',
+    border: `10px solid ${theme.palette.secondary.border}`,
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+}));
+
+const StyledRingContent = styled(Box)(({ theme }) => ({
+    borderRadius: '50%',
+    width: '180px',
+    height: '180px',
+    backgroundColor: theme.palette.secondary.light,
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    fontWeight: 'bold',
+    fontSize: theme.fontSizes.extraLargeHeader,
+    border: `10px solid ${theme.palette.background.paper}`,
+}));
+
+const StyledInsightsContainer = styled(Box)(({ theme }) => ({
+    marginTop: theme.spacing(4),
+    padding: theme.spacing(1.5),
+    background: theme.palette.background.elevation2,
+    borderRadius: `${theme.shape.borderRadius}px`,
+    display: 'flex',
+    alignItems: 'center',
+}));
+
+const StyledHeaderContainer = styled(Box)(({ theme }) => ({
+    display: 'flex',
+    alignItems: 'center',
+}));
+
+const StyledTextContainer = styled(Box)(({ theme }) => ({
+    display: 'flex',
+    flexDirection: 'column',
+    alignItems: 'flex-start',
+}));
+
+const StyledFlagCountPerUser = styled(Typography)(({ theme }) => ({
+    marginLeft: 'auto',
+    fontSize: theme.fontSizes.mainHeader,
+}));
+
+const StyledSettingsIcon = styled(Settings)(({ theme }) => ({
+    color: theme.palette.primary.main,
+    width: '15px',
+    height: '15px',
+    marginRight: theme.spacing(0.5),
+}));
+
+export const FlagStats = () => {
+    return (
+        <StyledContent>
+            <StyledHeader variant='h1'>
+                Total flags{' '}
+                <HelpIcon
+                    htmlTooltip
+                    tooltip={
+                        <Box>
+                            <Typography variant='body2'>
+                                Total flags represent the total active flags
+                                (not archived) that currently exist across all
+                                projects of your application.
+                            </Typography>
+                        </Box>
+                    }
+                />
+            </StyledHeader>
+            <StyledRingContainer>
+                <StyledRing>
+                    <StyledRingContent>9999</StyledRingContent>
+                </StyledRing>
+            </StyledRingContainer>
+
+            <StyledInsightsContainer>
+                <StyledTextContainer>
+                    <StyledHeaderContainer>
+                        <StyledSettingsIcon />
+                        <Typography
+                            fontWeight='bold'
+                            variant='body2'
+                            color='primary'
+                        >
+                            Insights
+                        </Typography>
+                    </StyledHeaderContainer>
+                    <Typography variant='body2'>Flags per user</Typography>
+                </StyledTextContainer>
+                <StyledFlagCountPerUser>3.5</StyledFlagCountPerUser>
+            </StyledInsightsContainer>
+        </StyledContent>
+    );
+};