Follow up #730 - rfc 5545 docs on components

[niccokunzmann]

This cherry-picks the commits by @Firdous2307.

git fetch https://github.com/Firdous2307/icalendar.git add-rfc-documentation
git checkout -b rfc-docs
git cherry-pick a27b146
git push

@stevepiercy, your suggested edits are included.

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📚 Documentation preview 📚: https://icalendar--738.org.readthedocs.build/

[coveralls]

Pull Request Test Coverage Report for Build 11530516952

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.489%

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Totals
Change from base Build 11393165915:	0.0%
Covered Lines:	3517
Relevant Lines:	3604

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💛 - Coveralls