[docs] Formatting and proper noun tune-up

[mattstein]

This PR is for tracking some of the initial cleanup work involved on #4188.

• Replace instances of “DDEV-Local”, “DDEV-Live”, and improperly-lowercased “ddev” with “DDEV”
• Wrap legitimate instances of “ddev”—used for references to the command or binary file—in backticks
• Consistently use smart punctuation / curly quotes
• Replace instances of “docker” with “Docker”
• Make sure the words AMD64, Apache, ARM64, Bash, Blackfire, Chocolatey, Colima, Composer, Drush, Git, Git Bash, GitHub, Gitpod, GoLand, Google, Homebrew, HTTP, HTTPS, IPv4, IPv6, Linux, NFS, nginx, Node.js, Pantheon, PHP, PhpStorm, PHPUnit, PostgreSQL, SSH, Terminus, Windows, and Xdebug are all properly capitalized
• Make sure “web server” always appears as two words in common usage (not “webserver”)
• Make sure CMS plural is “CMSes”, not “CMSs”
• Limit use of the phrases like “of course” and “it’s easy”
• Replace unexpected first-person “I” with “we”
• Use all-caps references for file extensions like JSON, YAML, CSS, etc.
• Generally reduce use of parentheses and asides to improve flow and readability
• Wrap references to files, directories, images and commands in backticks
• Link to related services and topics where convenient—usually first use on a given page
• Use Title Case for headings wherever it makes sense
• Introduce <kbd> elements for representing literal keystrokes
• Activate speaker for warmth when possible (“we recommend” instead of “it is recommended”)
• Avoid telling someone to “remember” information that hasn’t yet been introduced
• Improve consistency of !!!note, !!!tip and !!!warning callouts for asides, as opposed to Note: prefixes and other variations
• Consistently represent click paths with italics and arrows (General Settings → Experimental Features → Enable Nurb Splooping)

Edits are tediously separated and described in smallish commits.

[github-actions]

Download the artifacts for this pull request:

• all-ddev-executables.zip
• ddev-linux-amd64.zip
• ddev-linux-arm64.zip
• ddev-macos-amd64.zip
• ddev-macos-arm64.zip
• ddev-windows-amd64-installer.zip

[mattstein]

Worked through docs/content/developers/, and confused about the single Markdown linting error I can’t get rid of:

docs/content/developers/release-management.md:82:68 MD051/link-fragments Link fragments should be valid [Context: "upstream instructions"]
make: *** [markdownlint] Error 1

The heading changed so it was correct to call it out at first. But it should be right now and it behaves fine in my browser. Just rambling to myself and will come back to it later.

[mattstein]

Not sure how I managed to break the Buildkit tests @rfay, but otherwise ready to roll!

• Merged or resolved all suggestions. (Some minor edits, and a comment for any non-merged suggestion!)
• Restored headings for all tabular content, which also meant on the Shell Completion & Autocomplete page which didn’t have them to start with.
• Merged upstream changes, which was straightforward and not scary.
• Made sure spellcheck is okay with “Symfony” and “xz’d”—also removed my curly-apostrophe variants which apparently aren’t needed after all. 🤷‍♂️

[rfay]

Restarted, but TestComposerVersion may in fact be broken, we'll see what happens.

[rfay]

Looks like it's all going to pass, let me know when it's ready to pull!

[mattstein]

Tests finally finished, resubmitted for review! (Ready to pull.)

[rfay]

Yay, thanks!