`polkadot-sdk-docs`: Script to shorten all links.

[kianenigma]

See: https://github.com/paritytech/polkadot-sdk/pull/6094/files#r1812695521

[vjgaur]

@kianenigma I am taking up this issue.
One clarification where would the script code will go.
Are we suppose to add it in contributor folder?

[kianenigma]

It can be a simple python file in .maintain.

[vjgaur]

@kianenigma I have raised the PR for review. Thanks.