- Reorder instructions to mention ARM64 builds first in macOS,
as this is the primary architecture in use now (with all new Macs
since 2023 being sold with Apple Silicon only). The `lipo` command still
works as before, as it infers the architecture from the input files.
- Remove the manual bundle generation steps to make the page shorter
(similar to Compiling for Android).
- Remove references to the master branch (this was only relevant when
4.0 was still in development).
- Remove prompt or `$` sign which makes triple-click based selection
more difficult and time-consuming.
- Use `platform` instead of `p` alias in all SCons examples.
- Merge Community/Contributing and Engine Development into one top-level section, Contributing.
- Structure it in a way that gives equal priority to various ways to contribute, including documentation.
- Rename several articles to be more comprehensive and in line with the overall state of the documentation.
- Rewrite the guide for class reference contributions.
