blink.cmp & cmp-dap

### Is your feature related to a problem?

cmp-dap not available when using blink.cmp

### Describe the new feature

blink.cmp has a compatibility layer for cmp sources such as https://github.com/rcarriga/cmp-dap. Using https://github.com/saghen/blink.compat, it should be possible to get this to work.
```lua
dap = {
name = "dap",
module = "blink.compat.source",
enabled = function()
require("cmp_dap").is_dap_buffer()
end,
},
```

i see this snippet in https://github.com/Saghen/blink.cmp/issues/1319 that should make it possible to work, however i do not know the best way of going about this otherwise i would create a PR

### Additional context

_No response_

Start by reading the existing plugin specifications in this repository and the blink.compat source integration described in the issue. Verify how cmp-dap exposes cmp_dap.is_dap_buffer() and how blink.cmp registers compatibility sources. Done means cmp-dap is available through blink.cmp without breaking the existing plugin setup.

Written by the indexing model from the issue text.