Refactor: upgrade to docusaurus v3 + un-uniswap

[evchip]

Description

• remove or replace mentions of uniswap with t1
• remove event tracing and sentiment tracking -- unused
• upgrade to docusaurus to v3 and upgrade dependencies to work with v3
• add package manager enforcement for consistency
• use NODE_OPTIONS='--openssl-legacy-provider' to fix compatibility issue between node and webpack used by docusaurus v3

Motivation

• @OrestTa mentioned that we are using node 16 in this repo and wanted us to upgrade, but Docusaurus v2 doesn't support newer versions of node, so we had to upgrade.
• I want to use a mermaid diagram library to create xYield diagrams but it's only compatible with v3
• We want to remove mentions of uniswap to prepare this repo for public contributions

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[OrestTa]

s. https://t1protocol.slack.com/archives/C06NAHWB72N/p1758559983827199 @evchip

[OrestTa]

The colour scheme override to force dark mode is just for visual compatibility with our website? @evchip

[evchip]

The colour scheme override to force dark mode is just for visual compatibility with our website? @evchip

Yes, that's right. @OrestTa