Move description to Main page and other changes

[himanshugarg06]

A few major changes are listed

• move description to root of each page
• refactor the contract Addresses Page (Add entry point address)
• condense information on paymaster pages
• change the version from V2 to V3 (latest) since thats the latest version

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[himanshugarg06]

@livingrockrises can you verify the contract addresses Page and provide more information if needed.