Add hooks risk section

[garethfuller]

Add following text to risks page and link to it from pool pages.

"Hooks introduces complex logic into Balancer pools and changes in its parameters can significantly impact the risk profile of a pool. This complexity increases the potential for unforeseen errors or vulnerabilities in the hook's code, that may i.e. amplify impermanent loss, introduce new sources of volatility or impose restrictions on pool interactions like joins and exits.
Hook specific risk:

Balancer hooks introduce unique functionalities to Balancer pools, and while they offer exciting possibilities, they also present specific risks that users should be aware of.
Hook Interactions: Hooks can interact with each other and with the pool contracts in unexpected ways. These interactions may lead to unintended and yet unknown consequences or exploits.
Hook Updates: Hooks may be updated or modified over time. These updates could introduce new risks or alter the functionality of the pool in ways that may negatively impact your assets."