[FEATURE]: Per-module quiz for COA

[theblag]

Related Issue

Fixes #162

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Description

Added per module quizzes for all 8 chapters of the Computer Organization and Architecture (COA) course. Each quiz contains 10 structured multiple choice questions with balanced options and detailed explanations for each question.

Key Changes

• Quiz Questions [lib/quizData.ts]: Defined 8 new quizzes (coa-ch1 through coa-ch8) within the moduleQuizzes array.
• Quiz Cards [lib/quizData.ts]: Configured card metadata entries within moduleQuizCards to handle page card rendering and navigation details.
• Chapter Routing Map [app/sem3/coa/[chapter]/page.tsx]: Linked page slugs (ch1–ch8) to the newly introduced quiz slugs (coa-ch1–coa-ch8) in the local chapterQuizSlugMap.

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Type of Change

• Bug fix
• New feature
• Documentation update
• UI/UX improvement
• Refactor

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Screenshots / Demo

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How Has This Been Tested?

Tested Locally, build command ran successfully. Quiz questions verified by AI

Checklist

• My code follows the project structure and conventions
• I have tested the changes locally
• I have linked the related issue properly
• I have added screenshots where applicable
• No existing functionality was broken

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AI Usage

• I have not used AI tools for this contribution

• I have used AI tools (ChatGPT, Copilot, Claude, etc.) and I have reviewed, verified, and understood all generated code/content before submitting this PR

If AI tools were used, briefly explain how:

Used AI to extract best 10 questions from each modules, with detailed explanations.

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Additional Notes

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