add support for neocmakelsp CMake LSP

Christoph Cullmannrequested to merge
work/cmake into master

Works in principle but I get:

[18:12:18  LSP Server Log] cmake@/data/home/sandbox
2025-12-29T17:12:18.222536Z ERROR tower_lsp_f: Got a textDocument/documentHighlight request, but it is not implemented

Perhaps we do not query the capabilities correctly.

@mnauwelaerts

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