Feature Request: Inlay Hints for reference type

**Is your feature request related to a problem? Please describe.**
The language server should support [inlay hints](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_inlayHint) and emit inlay hints that indicate for a given reference, whether it comes from a param, var, or resource.

For example:

```bicep
param Test = 'ok'

var mytest = Test
```

should become when inlay hints are enabled:
```bicep
param Test = 'ok'

var mytest = param:Test
```
Where param will of course be rendered with alternate smaller gray font or whatnot by the editor.

Further, functions should emit inlay hints for their parameters where available.

Start with the linked LSP 3.17 textDocument/inlayHint specification, then locate the Bicep language-server handling for references and functions. Done means references expose whether they are params, variables, or resources, and functions expose parameter hints where available, with behavior matching the examples; the issue names no files or tests.

Written by the indexing model from the issue text.