feat(python): introduce dramsys Python package

Move all Python scripts out of the Trace Analyzer into a generic dramsys
package. To use the dramsys Python module in the Trace Analyzer, the user
is expected to install the package into a virtual environment together
with its dependencies.

The Python package also makes the follwing binaries available:
- dramsys_metrics
- dramsys_plots
- dramsys_tests
- dramsys_vcd_export

python/.python-version

@@ -0,0 +1 @@
+3.14