+ Add introductory paragraphs to each FAQ section.
+ Add 'missing dependency' entry to commands FAQ.
* Split commands FAQ to 'General' and 'DI' sections.

+ This commit reflects the new changes made to the Discord Application Developer Portal after its major update

+ Original lines stated that sending a emoji wrapped in colon will not be parsed, but that was incorrect; replaced with reactions instead of sending messages as the example

* Emphasize that normal emoji string will not translate to its Unicode representation.
* Clean up or add some of the samples featured in the article.
+ Add emoji/emote declaration section for clarification.
+ Add WebSocket emote sample.
- Remove inconsistent styling ('wacky memes' proves to be too out of place).

* Change passive voice in "Get Started" to active
* Fix improper preposition in Commands Introduction page
* Fix minor grammar mistakes in "Your First Bot" (future tense -> present tense/subjunctive mood -> indicative mood/proper noun casing/incorrect noun/add missing article)
* Fix minor grammar mistakes in "Installation" (missing article)

+ Add precondition usage sample
+ Add precondition group usage sample
+ Move precondition samples to its own sample folder

+ Fix various formatting.
+ Provide a more detailed walkthrough for dependency injection.
+ Add C# note at intro.

+ Rename Guides.Concepts.Logging title from 'Logging' to 'Logging Events/Data'.
+ Rewrite various sections of Guides.GettingStarted.FirstBot and Guides.GettingStarted.Installing based on suggested changes from #1027.
+ Rename project.csproj example to project.xml to avoid auto-compilation from Visual Studio Code.
+ Rename 'samples\intro' to 'samples\first-bot' to reflect on the article name change.
+ Clean first-bot samples.

+ Each section has gone through a thorough proof-reading and cleanup
+ This should help with readability.