Release: datasette-agent-charts 0.1a1

• More color! Bar and waffle charts without a color column are shaded by magnitude with a sequential color scheme; color columns holding text values use the observable10 categorical scheme. #2
• Now checks execute-sql permission before running the query to find the column names.
• Charts now display interactive tooltips.
• Fixed a bug where waffleY charts were not described to the agent.