[tuner] Reorganize tuner directories

Add a subdirectory for the tuner library. This is so that examples
do not have to be executed from the repo root and risk polluting it with
temporary files.

tuner/.gitignore

@@ -0,0 +1,5 @@
+.venv/
+
+# Tuning artifacts
+tuning_*/
+

tuner/README.md

@@ -4,13 +4,14 @@
 ## Prerequisites
 [Optional] Using virtual environments:
 ```shell
-cd tuning
+cd tuner
 python -m venv .venv
 source .venv/bin/activate
 ```
 Install python dependencies:
 ```shell
-pip install -r ./requirements-tuner.txt
+pip install -r requirements-tuner.txt
+pip install -r requirements-dev.txt
 ```
 Using the IREE's Python bindings:
    - Building with CMake
@@ -53,7 +54,7 @@ cp dump-winograd/*_141_*benchmark.mlir ./141.mlir
 6. Run the tuning script.
    - Example:
     ```shell
-    python punet_autotune.py 141.mlir --devices=hip://GPU-0,hip://GPU-4 --num-candidates=1024
+    python -m examples.punet 141.mlir --devices=hip://GPU-0,hip://GPU-4 --num-candidates=1024
     ```
 
 7. Check the winner candidate in `result_summary.log`, find and copy the transform spec.

tuner/examples/punet/punet_autotune.py

@@ -7,21 +7,21 @@
 """
 Sample Usage:
 
-python -m tuner.examples.punet benchmark.mlir --lhs-dims=bmk --rhs-dims=bkn --tile-dims=*mnk --devices=hip://0,hip://1 --num-candidates=64
+python -m examples.punet benchmark.mlir --lhs-dims=bmk --rhs-dims=bkn --tile-dims=*mnk --devices=hip://0,hip://1 --num-candidates=64
 
 
 Recommended Trial Run:
 
-python -m tuner.examples.punet benchmark.mlir --num-candidates=1
+python -m examples.punet benchmark.mlir --num-candidates=1
 
 
 Dry Run Test (no gpu requried):
 
-python -m tuner.examples.punet benchmark.mlir --num-candidates=64 --num-model-candidates=10 --dry-run
+python -m examples.punet benchmark.mlir --num-candidates=64 --num-model-candidates=10 --dry-run
 
 """
 
-from ... import libtuner
+from tuner import libtuner
 from pathlib import Path