BRP resource methods

[Leinnan]

Objective

BRP has no way to interact with Resources, this is a first step to change that.

Solution

• Add methods to:
  • list resources
  • get content of the resource
  • mutate a resource

Testing

Tested the commands by running the BRP sample( cargo run --example server --features="bevy_remote") and with these curl commands:

curl -X POST -d '{ "jsonrpc": "2.0", "id": 1, "method": "bevy/resources/list"}' 127.0.0.1:15702 | jq .

curl -X POST -d '{ "jsonrpc": "2.0", "id": 1, "method": "bevy/resources/get", "params": "bevy_picking::PickingPlugin" }' 127.0.0.1:15702 | jq .

curl -X POST -d '{ "jsonrpc": "2.0", "id": 1, "method": "bevy/resources/mutate", "params": {"resource": "bevy_picking::PickingPlugin", "path":"is_enabled", "value": false} }' 127.0.0.1:15702 | jq .

[Leinnan]

Close since there is already one #17423 accepted and ready to merge