* `scripts-python-liberty` label for the script which generates the
liberty timing files.
* `scripts-python-verilog` label for the script which generates a lot
of the verilog files.
Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
* Add `help-wanted` and `good-first-issue` labels.
* Document the general label color scheme.
* Pull the non-color grouped labels to the top of the file.
Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>