Add services from plugins

[0xFlicker]

Relates to:

n/a

Risks

low to medium. anyone using the node plugin and not loading these services would. this could cause errors? but probably stuff that didn't work starts working

Background

Spun up an eliza bot from eliza-starter (which I also separetly have some updates for)

What does this PR do?

Noticed that for the nodePlugin, the services it defines are not available from the agent runtime when calling getService. This change made it so that nodePlugin automatically brings in these services and the associated actions worked for me: https://github.com/ai16z/eliza/blob/main/packages/plugin-node/src/index.ts#L19-L25

What kind of change is this?

Bug fix

Documentation changes needed?

None, eliza-starter and other nodePlugin consumers should just "work better"

Testing

Where should a reviewer start?

Example code such as https://github.com/ai16z/eliza/blob/main/docs/docs/packages/agent.md should work as expected

Detailed testing steps

[ponderingdemocritus]

this is already being done - not sure why this needs to be here

[0xFlicker]

this is already being done - not sure why this needs to be here

sorry, wasn't on the most recent codebase!