chore: add `kalimba` to `README.rst`

[dee-me-tree-or-love]

What

Adding a link to the https://github.com/dee-me-tree-or-love/kalimba GH project. It is a little menu app to monitor and toggle the status of the Colima (container runtime for MacOs).

Example

From kalimba's README:

🐳 Kalimba == Co'lima Menu Bar

🌱 This is an early WIP, more information coming soon ✨

kalimba is a tiny menu bar application allowing to monitor and toggle the status of colima with a basic GUI written using rumps.

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