feat: Rewrite reportMixin to a composable (#10029)

# Pull Request Template

## Description

The PR will replace the usage of `reportMixin` with the help of
`useReportMetrics()` composable.

Fixes
https://linear.app/chatwoot/issue/CW-3450/rewrite-reportmixin-mixin-to-a-composable

**Files updated**
1. dashboard/routes/dashboard/settings/reports/Index.vue
2. dashboard/routes/dashboard/settings/reports/BotReports.vue
3. dashboard/routes/dashboard/settings/reports/ReportContainer.vue
4.
dashboard/routes/dashboard/settings/reports/components/WootReports.vue
5.
dashboard/routes/dashboard/settings/reports/components/ChartElements/ChartStats.vue

## Type of change

- [x] New feature (non-breaking change which adds functionality)

## How Has This Been Tested?

Test the all the reports view.


## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/dashboard/composables/spec/fixtures/reportFixtures.js

@@ -0,0 +1,37 @@
+export const summary = {
+  avg_first_response_time: '198.6666666666667',
+  avg_resolution_time: '208.3333333333333',
+  conversations_count: 5000,
+  incoming_messages_count: 5,
+  outgoing_messages_count: 3,
+  previous: {
+    avg_first_response_time: '89.0',
+    avg_resolution_time: '145.0',
+    conversations_count: 4,
+    incoming_messages_count: 5,
+    outgoing_messages_count: 4,
+    resolutions_count: 0,
+  },
+  resolutions_count: 3,
+};
+
+export const botSummary = {
+  bot_resolutions_count: 10,
+  bot_handoffs_count: 20,
+  previous: {
+    bot_resolutions_count: 8,
+    bot_handoffs_count: 5,
+  },
+};
+
+export const report = {
+  data: [
+    { value: '0.00', timestamp: 1647541800, count: 0 },
+    { value: '0.00', timestamp: 1647628200, count: 0 },
+    { value: '0.00', timestamp: 1647714600, count: 0 },
+    { value: '0.00', timestamp: 1647801000, count: 0 },
+    { value: '0.01', timestamp: 1647887400, count: 4 },
+    { value: '0.00', timestamp: 1647973800, count: 0 },
+    { value: '0.00', timestamp: 1648060200, count: 0 },
+  ],
+};