Updating all Arrays (tags etc) in mdx files to YAML format

[aatmanvaidya]

right now the tags in mdx files are stored as a comma seperated string. This is proving to be in-efficient in many ways.

we have to update the arrays to a YAML format (or something similar).

tags: 
    - Tag1
    - Tag2

It turns out that when you update the array to a YAML format in mdx files, Gatsby automatically starts updating the schema.
But that is taking too long on my machine (more than 45 mins). I am guessing because we have so many nodes, not sure.

@dennyabrain maybe whenever you get time, you can try this out on your machine.

[dennyabrain]

@aatmanvaidya can you make a PR with changes so i just have to run npm run start to test this? I tried changing tags for one but it looks like having mixed types it not allowed. So i am guessing you've changed tags for all.

[aatmanvaidya]

@dennyabrain even I just changed for one, and the updating schema started, but yes, my development server was already running then, so like
first I ran npm run develop
and then, I updated just one tag into YAML, and then the updating schema popped up in the terminal.

[dennyabrain]

Gotcha. No worries then, if I change all tags then will test and post here.