UI improvement

[24seconds]

Description

This issue is a big issue which contains all the UI related small ~ medium issues.

• Use grid in orka App #59
• Apply hover effect for all components which need it
• Apply animations
• Add notification pop up component
• adjust some colors for fully support of light mode #67
• add github, behance badge #49
• add link url style (refer linkifyjs)
• remove selectable for peer's TXT, PNG component
• what else?
• display tooltip when hover the truncated text
• small improvement: peer activity layout #61