feat(p/rbac): RBAC Pacakge Implementation

[notJoon]

Description

Implemented the RBAC package, but need to discussion whether it should be located in p or r.

paritally related with #496

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[onlyhyde]

If you organize RBAC as a package, there is no ledger to manage roles and addresses for roles. How do you think it will be used?

[notJoon]

If you organize RBAC as a package, there is no ledger to manage roles and addresses for roles. How do you think it will be used?

I considered a structure where p contains only pure implementations, while r contains global variable declarations.

For example:

package xxx

import (
    "gno.land/p/demo/rbac"
)

var Manager = rbac.New()

// ...

If we move the package to the r side, I just need to add the code above directly to the rbac package.