Write Injector V1 deployment and operation docs

[Tritium-VLK]

How do find them?
What causes them to execute?
How to configure them/use them?

Special operations?

[Tritium-VLK]

[Xeonus]

Must have docs from my POV:

• Introduction of what Inejctors do
• Reference and what all read and write methods do
• Registry of all injectors across deployments
• Maintenance / Upkeep of them, this includes: how to configure payloads, a troubleshooting FAQ and use-case examples

[Zen-Maxi]

Think it would be good to have also or combined / sub-sections of what was mentioned

• With Intro -> End goal for teams to use them not maxis
• Things to avoid or "what can go wrong" maybe in each configure section
• Edge cases, like when its ETH or LINK dependent.
• How to deploy a new one from scratch