fix : replace emoji icons with text alternatives in portfolio_analyzer.py

[tmdeveloper007]

Summary of What Has Been Done

Replaced all emoji characters in the PROJECT_CATEGORIES OrderedDict in src/utils/portfolio_analyzer.py with plain-text abbreviations to comply with the project style guidelines.

Changes Made

• Frontend icon: "\U0001f3a8" -> "[FE]"
• Backend icon: "\U00002699" -> "[BE]"
• Database icon: "\U0001f5c4" -> "[DB]"
• Authentication icon: "\U0001f510" -> "[AUTH]"
• API Integration icon: "\U0001f50c" -> "[API]"
• Testing icon: "\U0001f9ea" -> "[TEST]"
• Deployment icon: "\U0001f680" -> "[DEPLOY]"
• AI/ML icon: "\U0001f916" -> "[AI]"
• DevOps icon: "\U0001f9e0" -> "[DO]"
• Real-time icon: "\U0001f4ac" -> "[RT]"

Impact it Made

• Consistent emoji-free codebase style
• No rendering/encoding issues in environments without emoji support
• Cleaner log and diagnostic output

Closes #1308

Note: Please assign this PR to the tmdeveloper007 account.

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