This commit introduces a new `CONTROLS.md` file, created by converting the content from `Controls-Guide.pdf` into a well-formatted Markdown document. The new file provides a clear and concise guide to configuring controls using the `controls.ini` file.
Additionally, the existing `docs/guide.md` has been reformatted to improve readability, using emojis for headings and specific language identifiers for code blocks.
Finally, a new 'Documentation' section has been added to the main `README.md` file, providing prominent links to both the new `CONTROLS.md` and the updated `guide.md`.
Each analogue input now gets 3 deadzones, start, middle, and end. These
deadzones are a percentage of the total range that should be squashed to
the extreme.
SBH