docs: migrated the Reports component from the old docs to the new docs

[OfficialJhimmy]

No description provided.

[OfficialJhimmy]

This pull request migrates over the documentation for the Reports Component in the reStructuredText (RST) format. It addresses #199.

[RCheesley]

Thanks for making a start at this @OfficialJhimmy - there's a lot of Vale fixes to address and probably more lurking beneath your use of vale off.

Please remove all of those, and we'll tell you where to use it if it's absolutely necessary.

Shout if you need some help running Vale in your editor, it should have picked all of these up while you were typing!

[RCheesley]

Suggested change

	To add and render custom reports in Mautic, your plugin needs to listen to three events:
	To add and render custom Reports in Mautic, your Plugin needs to listen to three events:

[OfficialJhimmy]

Thank you, I have fixed this.

[RCheesley]

Suggested change

	This guide walks you through defining a custom report, generating report data, and rendering graphs.
	This guide walks you through defining a custom Report, generating Report data, and rendering graphs.

[OfficialJhimmy]

Thank you for this, I have fixed this