[Feature request] Adding README.md for all connectors like Grafana-connector

Start with the existing grafana-connector README.md and inspect the other connector modules in the iotdb-extras repository. Use the existing README as the documentation structure, covering each module's overview, prerequisites, build and installation instructions, usage examples, and configuration parameters. Done means every connector module has equivalent module-level documentation.

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Motivation

While exploring the iotdb-extras repository, I noticed that the grafana-connector module has a README.md providing clear documentation on installation, usage, and configuration. However the other connector modules do not have equivalent module-level documentation. Developers and contributors landing on these modules have no quick reference for understanding their purpose, architecture, configuration, or usage without diving directly into the source code. Standardizing README documentation across all connector modules would improve contributor onboarding, reduce friction for new users, and bring consistency to the repository.

Solution

Add a README.md to each of the connector modules, following the same structure and style as the existing grafana-connector README:
Each README will cover module overview, prerequisites, build and installation instructions, basic usage examples, and configuration parameters — consistent with the existing grafana-connector documentation style.

Alternatives

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!