Add monitee-agent

Thanks for taking the time to suggest an addition to awesome-sysadmin!

Please fill out information below (all fields are mandatory unless noted otherwise):

```yaml
# software name
name: "Monitee agent"
# URL of the software project's homepage
website_url: "https://monitee.app/"
# URL where the full source code of the program can be downloaded
source_code_url: "https://github.com/Krillsson/monitee-agent"
# description of what the software does, shorter than 250 characters, sentence case
description: "Server monitoring with an Android client. Tracks hardware metrics, Docker containers, systemd services and log reading. HTTP/TCP/ping/DNS checks and push alerts. GraphQL API"
# list of license identifiers, see https://github.com/awesome-foss/awesome-sysadmin-data/blob/master/licenses.yml for the full list of licenses
licenses:
- Apache-2.0
# list of languages/platforms, see https://github.com/awesome-foss/awesome-sysadmin-data/tree/master/platforms for the full list of platforms
platforms:
- Java
- deb
- Docker
# list of tags (categories), see https://github.com/awesome-foss/awesome-sysadmin-data/tree/master/tags for the full list of tags
tags:
- Log management
- Metrics & Metric Collection
- Monitoring & Status Pages
- Troubleshooting
# (optional, true/false, default false) whether the software depends on a third-party service outside the user's control
depends_3rdparty: false
# (optional) link to an interactive demo of the software
demo_url: "https://my.awesome.softwar.e/demo"
# (optional) link to a list of clients/addons/plugins/apps/bots... for the software
related_software_url: "https://play.google.com/store/apps/details?id=com.krillsson.monitee
```

To ensure your issue is dealt with swiftly, please check the following (check the boxes `[x]`):

- [x] Submit one item per issue. This eases reviewing and speeds up inclusion.
- [x] You have searched the repository for any relevant [issues](https://github.com/awesome-foss/awesome-sysadmin-data/issues) or [PRs](https://github.com/awesome-foss/awesome-sysadmin-data/pulls), including closed ones.
- [x] Any software you are adding is not already listed at any of [awesome-selfhosted](https://github.com/awesome-selfhosted/awesome-selfhosted), [dbdb.io](https://dbdb.io/browse).
- [x] Any software project you are adding to the list is actively maintained.
- [x] Any software project you are adding was first released more than 12 months ago.
- [x] Any software project you are adding has working installation instructions.

Start by inspecting the repository's existing data entries and the referenced licenses, platforms, and tags lists, then review the Monitee project and source links in the issue. Add the Monitee agent using the required fields and validate that its metadata, URLs, and categorization match repository conventions.

Written by the indexing model from the issue text.