Vuepress samples

[etimberg]

Start moving samples to Vuepress

Sample To-Do List

• Bar Charts
• Line Charts
• Area Charts
• Other Charts - @LeeLenaleee
• Linear Scale
• Log Scale
• Time Scale
• Scale Options - @etimberg
• Legend - @etimberg
• Title - @etimberg
• Tooltip - @etimberg
• Scriptable
• Animations - @kurkle
• Advanced

[etimberg]

@LeeLenaleee I added a to-do list here to track what's done/WIP. I was thinking about taking the scale options samples next

[LeeLenaleee]

Other charts is WIP

[LeeLenaleee]

Resolves #8672

Will need to delete the old samples folder and deploy of that folder before this gets merged

[etimberg]

Yup, we'll need to remove the old samples for the master and next versions. I was thinking the order would be:

1. Merge this PR
2. Confirm new samples are visible (should be at https://chartjs.org/docs/master/samples)
3. Remove old samples (and associated build steps)

Once v3 releases here, we'll need to update the main website landing page to point to the new samples https://github.com/chartjs/chartjs.github.io/blob/master/index.html#L45

We also likely want to change https://github.com/chartjs/chartjs.github.io/blob/master/samples/index.html to redirect to the new samples spot which will be /docs/latest/samples