Code fix to suggest specifying properties on `object`-typed params

**Is your feature request related to a problem? Please describe.**
Parameters can use a type of `object`, which causes any property access on said param to be implicitly treated as valid by the compiler.

**Describe the solution you'd like**
If any properties are unconditionally accessed on a param with a type of `object`, we could propose a code fix diagnostic to change the type to one with explicit property definitions.

For example, we could propose that the following:

```bicep
param foo object

output fooProp string = foo.bar
```

be changed to the following:

```bicep
param foo { bar: string }

output fooProp string = foo.bar
```

Start by locating the compiler code-fix handling for property access on parameters typed as object; the issue names no files or tests. Done means the diagnostic proposes an explicit property definition when properties are unconditionally accessed, matching the foo/bar example, with coverage for the resulting suggestion.

Written by the indexing model from the issue text.