Kitty tutorial updates: new pallet declaration, removing types.json and updating write-up

[sacha-l]

This PR updates several things around maintaining the Kitty tutorial, in the different repositories it touches. There's two main areas of updating: code on template branches and write-up here.

Front-end template (code updates):

• Finish "Set Price" modal as per [CODE BUG]: Kitties tutorial part2 #461
• Update dependencies: @polkadot/api and @polkadot/types to 6.7.2. Follow last months PR to capture other necessary changes. (See commits from Nov 9, 2021)
• Remove types.json (See commits from Nov 9, 2021)

Node template branch (code updates):

• Fix pallet name to match Fixies to Kitties Part2, to be compatible with Part1 #357.
• Remove runtime/types.json
  See commits from Nov 9th, 2021.
• Update to latest monthly tag as per 11-kitties-workshop -- test with #511
  See commit.

Substrate docs (write-up):

• Update write-up according to pallet name changes (from Kitties to SubstrateKitties)
• Update template files and write-up with new construct_runtime! pallet declaration
• Remove types.json in both template code (in this repo) and write-up
• Fix issues from post add .prettierignore, format .mdx files, run fmt:docs #210  #482 (examples include this and other numbering issues because of indentation changes).
• Check Feedback Submission - tutorials - Build the Substrate Kitties Chain - /tutorials/v3/kitties/pt1 #516

[sacha-l]

@imadarai : seems like link checker is failing on substrate.io urls - any reason this is happening that you can tell? 🤔
Update: ran it again and seems like its all good now 🤷🏻 😃 .