In addition to the existing `OpHandle` which provides an abstraction to
emit transform ops targeting operations this introduces a similar
concept for _values_ and _parameters_ in form of `ValueHandle` and
`ParamHandle`.
New core transform abstractions:
- `constant_param`
- `OpHandle.get_result`
- `OpHandle.print`
- `ValueHandle.get_defining_op`
This adds Python abstractions for the different handle types of the
transform dialect
The abstractions allow for straightforward chaining of transforms by
calling their member functions.
As an initial PR for this infrastructure, only a single transform is
included: `transform.structured.match`.
With a future `tile` transform abstraction an example of the usage is:
```Python
def script(module: OpHandle):
module.match_ops(MatchInterfaceEnum.TilingInterface).tile(tile_sizes=[32,32])
```
to generate the following IR:
```mlir
%0 = transform.structured.match interface{TilingInterface} in %arg0
%tiled_op, %loops = transform.structured.tile_using_for %0 [32, 32]
```
These abstractions are intended to enhance the usability and flexibility
of the transform dialect by providing an accessible interface that
allows for easy assembly of complex transformation chains.
