[LOTP] Add Sealights

# Description of the LOTP tool

SeaLights' platform enforces comprehensive testing coverage by blocking untested code changes from reaching production and intelligently executing only the tests that cover modified code.

Tools:
- slcli
- slgoagent
- [SeaLights Pull Request Analysis](https://github.com/apps/sealights-pull-request-analysis)

# Configuration files

```
.slconfig.yaml
```

# Documentation
https://docs.sealights.io/knowledgebase/setup-and-configuration/sealights-agents/go-agent/go-agent-v2/agent-configuration-parameters#when-using-a-configuration-file

Start by reading the SeaLights agent configuration documentation linked in the issue, with particular attention to .slconfig.yaml and the listed slcli and slgoagent tools. Done means the LOTP catalog includes SeaLights with its tools, configuration file, Pull Request Analysis integration, and documentation link.

Written by the indexing model from the issue text.