Refactor: Unify duplicate project registries into a shared projects database

[nishtha-agarwal-211]

Description

The project list registry is currently hardcoded and duplicated across multiple files:

1. search_projects.py (under the PROJECTS array).
2. utilities/Progress-Tracker/Progress-Tracker.py (under the ALL_PROJECTS dictionary).
3. The Web App tracker system.

This duplication leads to inconsistencies when new projects are added.

Proposed Solution

1. Create a central projects_registry.json database at the root of the project.
2. The JSON should store schema information for each project:

   [
     {
       "name": "Rock Paper Scissors",
       "emoji": "🪨",
       "category": "games",
       "difficulty": "beginner",
       "description": "Battle against the computer...",
       "keywords": ["rock", "paper", "scissors"],
       "path": "games/Rock-Paper-Scissor/Rock-Paper-Scissor.py"
     }
   ]

3. Refactor search_projects.py to read dynamically from this file using the json module.
4. Refactor Progress-Tracker.py to populate its category lists dynamically using this file.

[github-actions]

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[steam-bell-92]

@nishtha-agarwal-211 assigned