Fix broken in-app links

[michalbrabec]

There are a few links in hardhat logs, messages, and error descriptors that link to broken pages or have hardcoded links.

Instead of linking the full url of a section of the website, a new entry should be created in src/redirects/in-app-shortlinks.ts, so redirecting a permanent short-link to its full URL.

All links must be shortened and full links redirected in the in-app-shortlinks.ts file.

For example, instead of linking to /docs/reference/console-log from Hardhat, we have the entry ["/console-log", "/docs/reference/console-log"] in src/redirects/in-app-shortlinks.ts, and use /console-log instead.

This task is scoped purely to the source files (*.ts), READMEs and changelogs will be addressed in #158

[michalbrabec]

The links are in Hardhat repo, redirects are in website and the must be added for all broken links. Let's take console-log as an example

• The original link: build-system.ts
• The redirect: in-app-shortlink.ts
• The actual page: https://hardhat-website-5kelu7e0b-nomic-foundation.vercel.app/docs/reference/console-log instead of https://hardhat-website-5kelu7e0b-nomic-foundation.vercel.app/console-log (using the deployment from the develop PR Devconnect docs preparation #139)
  The objective is to identify all such links, add the redirects and set up a system / process to make sure we do not get more

[michalbrabec]

@alcuadrado how do we want to guard agains future broken links?d

• Include a manual check for this (reminder) as part of the Check that the PR links to documentation?
• Design a new Action that would check for a presence of any links in the changes and require a website PR only if there are any (or a label no-redirects-needed)?

Note: this would be a post-DevConnect effort