refactor(agent): Refactor resource of agents

[fangyinc]

Description

Refactor the plugin module and resource module into a unified resource module.

There are several resource types in the agent, including database, knowledge, tool, pack, etc.
Specifically, the collection of resources is a special type of resource, called a resource pack.

How Has This Been Tested?

To test the new resource module, you can run all python files in the examples/agents directory.

Snapshots:

Include snapshots for easier review.

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[csunny]

Bug about pydantic upgrade

"1 validation error for SqlRunData\nrun_cost\n  Input should be a valid integer, got a number with a fractional part [type=int_from_float, input_value=6.7138671875e-05, input_type=float]\n    For further information visit https://errors.pydantic.dev/2.7/v/int_from_float"

[fangyinc]

Bug about pydantic upgrade

"1 validation error for SqlRunData\nrun_cost\n  Input should be a valid integer, got a number with a fractional part [type=int_from_float, input_value=6.7138671875e-05, input_type=float]\n    For further information visit https://errors.pydantic.dev/2.7/v/int_from_float"

FIx it.

[csunny]

Great refactor, that makes the relationship between resources and agents clearer.

[yhjun1026]

r+