[RF-DOCS] Update Rails Error Reporting Guide [ci skip]

[OughtPuts]

Motivation / Background

This PR updates the Rails Error Reporting guide.

Additional information

• 'For Libraries' is made into a top section and renamed 'Error-reporting Libraries'
• Various important paragraphs are reformatted into notes.
• To aid understanding for beginners, links are added when various concepts are referenced e.g. 'railties', 'jobs' etc.
• Sections are added on unexpected, unsubscribe and disable.
• Various wording tweaks are made for improved readability and easier understanding.

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Unrelated changes should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]

[bhumi1102]

Good work @OughtPuts on your first guide! I've left minor comments and some rewordings.

I'm half way done.

[bhumi1102]

Nice work @OughtPuts 🎉

All done with my review. Let me know if you have any questions on any of my comments.

[p8]

Looks great!

[p8]

Maybe it makes sense to bump the headers one level higher?
This could make the sidebar have more levels?

On the other hand, this is a short guide...

[OughtPuts]

Maybe it makes sense to bump the headers one level higher? This could make the sidebar have more levels? On the other hand, this is a short guide...

hmmm yeah, I know what you mean, don't want the sidebar to be overkill? I've left it for now but I'm going to mull over that as I address other internal/community changes!