[DOC] Create section for interacting with staking contract

[thisisjoshford]

Documentation Type

New Documentation

What needs documentation?

One of the top searched items in docs is "staking" which only links to the storage staking concept but doesn't tell users about how to interact with the staking-pool contract (which they are most likely looking for).

How to delegate tokens to a staking pool contract (validator) and view balances/rewards should be easy to find.

Acceptance Criteria

• [ ] Create article that shows how to interact with the staking-pool contract
• [ ] Users should be able to understand how delegating tokens to a staking-pool works and how to delegate, view balances, and withdraw
• [ ] Ensure its ranked high in our algolia search box by using the proper headers & descriptions
• [ ] Show near-staking.com as a community tool to query accounts

Resources & References

Core contract README for staking-pool

• https://github.com/near/core-contracts/tree/master/staking-pool#usage

Priority

🟠 P1 : Important Documentation Gap

[frol]

@thisisjoshford the most accurate view of the balances I know is MNW: https://app.mynearwallet.com/profile/frol.near (though you have to manually edit the account id in the link)

Second best option is https://near-staking.com/