[DOCS] Add Ludic to the section "Other languages and related projects"

**Issue Type**
- [ ] Existing documentation (e.g. typos, errors, outdated information)
- [x] Suggest new documentation that is currently missing

**Current Behavior or Documentation Gaps**

Hi FastHTML devs,

glad to see a similar project to Ludic. The documentation mentions "_we’ll list here other projects that have a similar approach to FastHTML_", so I thought https://getludic.dev/ has very similar approach and could be mentioned there as well.

Side note: I also want to add comparison of Ludic to FastHTML, see https://github.com/getludic/ludic/issues/86

**Relevant Links**

- https://github.com/getludic/ludic
- https://getludic.dev/docs/

**Confirmation**

Please confirm the following:
- [x] I have checked the existing issues and pull requests to ensure this documentation issue hasn't been reported before.
- [x] I have read the project's documentation and am confident this issue or suggestion is valid.