get stake interface in solidity

[open-junius]

Description

The PR add the stake data access in solidity precompile contract.

Related Issue(s)

• Closes Add view method to staking precompile to access stake map #857

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Other (please describe):

Breaking Change

If this PR introduces a breaking change, please provide a detailed description of the impact and the migration path for existing applications.

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have run cargo fmt and cargo clippy to ensure my code is formatted and linted correctly
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Screenshots (if applicable)

Please include any relevant screenshots or GIFs that demonstrate the changes made.

Additional Notes

Please provide any additional information or context that may be helpful for reviewers.

[orriin]

Looks good, can we get a test?

[open-junius]

Looks good, can we get a test?
Verified the interface via js code, let me push it into main branch of subtensor-js-tests.

https://github.com/opentensor/subtensor-js-tests/blob/main/src/evm/eth.staking.precompile.test.js#L192

[gztensor]

Please implement the e2e test for this as a separate test and let it fail. When we merge to devnet-ready, the tests will be passing.

[open-junius]

https://github.com/opentensor/subtensor-js-tests/blob/main/src/evm/eth.staking.precompile.test.js#L215 separate test case is added.

[kyriediculous]

It would be great to have this merged ! Thanks for this PR.