David Spickett 210a383e18 [LLVM][TableGen] Add jupyter kernel for llvm-tblgen
This is based on the MLIR opt kernel:
https://github.com/llvm/llvm-project/tree/main/mlir/utils/jupyter

The inent of this is to enable experimentation and the creation
of interactive tutorials for the basics of tablegen.

Noteable changes from that:
* Removed the codemirror mode settings since those won't exist
  for tablegen.
* Added "%args" "magic" to control arguments sent to llvm-tblgen.

(magics are directives, see
https://ipython.readthedocs.io/en/stable/interactive/magics.html)

For example the following:
```
%args --print-detailed-records
class Stuff {}

def water_bottle : Stuff {}
```
Produces:
```
DETAILED RECORDS for file -

-------------------- Global Variables (0) --------------------

-------------------- Classes (1) --------------------

Stuff  |<stdin>:1|
  Template args: (none)
  Superclasses: (none)
  Fields: (none)

-------------------- Records (1) --------------------

water_bottle  |<stdin>:3|
  Superclasses: Stuff
  Fields: (none)
```

Reviewed By: jpienaar, awarzynski

Differential Revision: https://reviews.llvm.org/D132378
2023-01-23 14:15:55 +00:00

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{
"argv": [
"python3", "-m", "tablegen_kernel", "-f", "{connection_file}"
],
"display_name": "LLVM TableGen",
"language": "tablegen",
"language_info": {
"name": "tablegen",
"codemirror_mode": "tablegen",
"mimetype": "text/x-tablegen",
"file_extension": ".td",
"pygments_lexer": "text"
}
}