Fix point calculation 621

[bhavyaxtech]

Description

Fixes #621

This PR refines the DevPath point calculation system to make scoring more balanced, transparent, and resistant to duplicate rewards.

Changes Included

• Updated point constants to align with the proposed scoring strategy.
• Added capped daily login streak multiplier logic.
• Added dynamic badge XP calculation based on badge rarity.
• Converted first project upload rewards into a one-time achievement to prevent repeated rewards.
• Expanded the "How to Earn Points" section with 10 additional activity parameters.
• Improved maintainability and consistency of point calculation logic.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Verified point calculations manually for different activity scenarios.

• Verified streak multiplier limits.

• Verified badge rarity-based XP assignment.

• Verified first project upload rewards are granted only once.

• Confirmed documentation updates render correctly.

• Local testing

• Vercel Preview Deployment

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have checked that the "DevPath India" branding remains intact

[devpathindcommunity-india]

@bhavyaxtech kindly share the video for this PR, how it is after your change.