fix:added info tooltip in the participations page

[sphurthy]

Description

Related PRS (if any):

None

Main changes explained:

• Added an information (ⓘ) icon next to the “No-show rate insights” title to provide contextual help.
• Implemented a hover-based tooltip that explains how insight bars and percentages are calculated.
• Tooltip clarifies that:
• Percentages represent the average no-show rate for the selected category (Event Type, Time, or Location).
• Data is aggregated across all matching events within the selected time range.
• Higher percentages indicate a greater likelihood of participants not attending.
• Made the tooltip content dynamic, updating automatically when users switch between insight tabs.
• Improved overall user confidence and interpretability of participation metrics without altering existing calculations or data logic.

How to test:

1. check into current branch
2. do npm install and ... to run this PR locally
3. Clear site data/cache
4. Navigate to Community Portal → Reports → Participation → No-show rate insights.
5. Verify that the ⓘ icon appears next to the section title.
6. Hover over the ⓘ icon and confirm that a tooltip is displayed.
7. Check that the tooltip text:
   a. Clearly explains how percentages are calculated.
   b. Mentions aggregation across events within the selected time range.
8. Switch between Event Type, Time, and Location insight tabs.

Screenshots or videos of changes:

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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