feat: create students countries stats widget

[valerydluski]

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🤔 This is a ...

• New feature
• Bug fix
• Performance optimization
• Refactoring
• Test Case
• Documentation update
• Other

🔗 Related issue link

#2395

💡 Background and solution

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Database migration is added or not needed
• Documentation is updated/provided or not needed
• Changes are tested locally

[github-actions]

📦 Next.js Bundle Analysis

This analysis was generated by the next.js bundle analysis action 🤖

⚠️ Global Bundle Size Increased

Page	Size (compressed)
global	111 KB (🟡 +42 B)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!

New Page Added

The following page was added to the bundle from the code in this PR:

Page	Size (compressed)	First Load	% of Budget (500 KB)
/course/admin/dashboard	253.34 KB	364.34 KB	72.87%

Fifty-four Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load	% of Budget (500 KB)
/	292.77 KB	403.77 KB	80.75% (🟡 +0.02%)
/404	227.51 KB	338.51 KB	67.70% (🟡 +0.02%)
/admin/courses	388.23 KB	499.23 KB	99.85% (🟡 +0.01%)
/admin/disciplines	333.51 KB	444.51 KB	88.90% (🟡 +0.02%)
/admin/discord-server	360.33 KB	471.33 KB	94.27% (🟡 +0.01%)
/admin/events	360.92 KB	471.92 KB	94.38% (🟡 +0.02%)
/admin/mentor-registry	384.44 KB	495.43 KB	99.09% (🟡 +0.01%)
/admin/notifications	399.37 KB	510.37 KB	102.07% (🟡 +0.02%)
/admin/prompts	340.79 KB	451.79 KB	90.36% (🟡 +0.01%)
/admin/registrations	332.67 KB	443.67 KB	88.73% (🟡 +0.02%)
/admin/tasks	445.45 KB	556.45 KB	111.29% (🟡 +0.02%)
/admin/user-group	384.38 KB	495.38 KB	99.08% (🟡 +0.01%)
/admin/users	275.47 KB	386.47 KB	77.29% (🟡 +0.02%)
/applicants	315.7 KB	426.7 KB	85.34% (🟡 +0.01%)
/course/admin/cross-check-table	472.77 KB	583.77 KB	116.75% (🟡 +0.02%)
/course/admin/events	442.43 KB	553.43 KB	110.69% (🟡 +0.01%)
/course/admin/interviews	383.16 KB	494.16 KB	98.83% (🟡 +0.02%)
/course/admin/mentors	389.5 KB	500.5 KB	100.10% (🟡 +0.02%)
/course/admin/stage-interviews	384.75 KB	495.75 KB	99.15% (🟡 +0.02%)
/course/admin/students	397.44 KB	508.44 KB	101.69% (🟡 +0.01%)
/course/admin/tasks	416.33 KB	527.33 KB	105.47% (🟡 +0.01%)
/course/admin/users	383.19 KB	494.19 KB	98.84% (🟡 +0.01%)
/course/interview/[type]/feedback	348.33 KB	459.33 KB	91.87% (🟡 +0.01%)
/course/mentor/auto-confirm	229.75 KB	340.74 KB	68.15% (🟡 +0.01%)
/course/mentor/confirm	296.49 KB	407.49 KB	81.50% (🟡 +0.01%)
/course/mentor/dashboard	404.07 KB	515.07 KB	103.01% (🟢 -0.05%)
/course/mentor/expel-student	300.55 KB	411.55 KB	82.31% (🟡 +0.01%)
/course/mentor/feedback	302.63 KB	413.62 KB	82.72% (🟡 +0.02%)
/course/mentor/interview-technical-screening	268.84 KB	379.84 KB	75.97% (🟡 +0.01%)
/course/mentor/interview-wait-list	341.7 KB	452.7 KB	90.54% (🟡 +0.02%)
/course/mentor/interviews	352.74 KB	463.74 KB	92.75% (🟡 +0.01%)
/course/mentor/students	252.68 KB	363.68 KB	72.74% (🟡 +0.01%)
/course/schedule	486.42 KB	597.42 KB	119.48% (🟡 +0.02%)
/course/score	341.95 KB	452.94 KB	90.59% (🟡 +0.01%)
/course/student/auto-test	393.88 KB	504.88 KB	100.98% (🟡 +0.01%)
/course/student/auto-test/task	393.79 KB	504.79 KB	100.96% (🟡 +0.01%)
/course/student/cross-check-review	488.32 KB	599.32 KB	119.86% (🟡 +0.02%)
/course/student/cross-check-submit	504.55 KB	615.55 KB	123.11% (🟡 +0.02%)
/course/student/dashboard	400.14 KB	511.14 KB	102.23% (🟢 -0.16%)
/course/student/interviews	306.61 KB	417.61 KB	83.52% (🟡 +0.02%)
/course/submit-scores	417.26 KB	528.26 KB	105.65% (🟡 +0.02%)
/course/team-distributions	385.38 KB	496.38 KB	99.28% (🟡 +0.01%)
/course/teams	431.89 KB	542.89 KB	108.58% (🟡 +0.01%)
/cv/[uuid]	247.73 KB	358.73 KB	71.75% (+/- <0.01%)
/cv/edit	351.71 KB	462.71 KB	92.54% (🟡 +0.02%)
/gratitude	295.01 KB	406.01 KB	81.20% (🟡 +0.02%)
/heroes	401.41 KB	512.41 KB	102.48% (🟡 +0.02%)
/job	171.97 KB	282.97 KB	56.59% (🟡 +0.02%)
/profile	411.54 KB	522.54 KB	104.51% (🟡 +0.01%)
/profile/connection-confirmed	269 KB	380 KB	76.00% (🟡 +0.01%)
/profile/notifications	333.85 KB	444.84 KB	88.97% (🟡 +0.02%)
/registry/epamlearningjs	296.01 KB	407 KB	81.40% (🟡 +0.02%)
/registry/mentor	347.08 KB	458.08 KB	91.62% (🟡 +0.01%)
/registry/student	347.07 KB	458.07 KB	91.61% (🟡 +0.02%)

Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

The "Budget %" column shows what percentage of your performance budget the First Load total takes up. For example, if your budget was 100kb, and a given page's first load size was 10kb, it would be 10% of your budget. You can also see how much this has increased or decreased compared to the base branch of your PR. If this percentage has increased by 5% or more, there will be a red status indicator applied, indicating that special attention should be given to this. If you see "+/- <0.01%" it means that there was a change in bundle size, but it is a trivial enough amount that it can be ignored.