Add icons

## Description
Adding icons for the components in the navbar section.
**Is your feature request related to a problem? Please describe.**

**Describe the solution you'd like**
Adding icons for the components such as for home, features, mental health problems and power of knowledge

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

## Additional Information

**Context**
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**Potential Implementation** (optional)
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**Screenshots or Mockups** (optional)

**Priority** (optional)
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**Additional Notes** (optional)
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