Blocks chart page

[janmichek]

Acceptance criteria:

• A new page called "Charts" is visible in the top menu
• A left navigation bar is visible in the page with a clickable item "Blocks"
• The right side of the page contains a chart with blocks data
• At the top of the chart:
  • Time interval controls are visible
  • A dropdown to select the resolution is visible with the following values: 1 Day, 1 Week, 1 Month
• The default interval of the chart is the last year with a resolution of 1 day

Mdw endpoint: https://mainnet.aeternity.io/mdw/v3/statistics/blocks

[janmichek]

@michele-franchi do we wanna accomodate this https://github.com/aeternity/aescan/issues/689 here ?

[michele-franchi]

@janmichek IMO #689 should be done separately, I'll think about it