docs: Update generated README content to use Simplified Technical English

[Joshua Smithrud (Josmithr)]

Updates markdown-magic templates and all derived collateral to use ASD-STE100 Simplified Technical English for better accessibility.

Reviewer Guidance

Most of the changed files are derived content. I recommend reviewing the changes under tools/markdown-magic first.

[github-actions]

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Based on the diff (6175 lines, 183 files), I've queued these reviewers:

• Correctness — logic errors, race conditions, lifecycle issues
• Security — vulnerabilities, secret exposure, injection
• API Compatibility — breaking changes, release tags, type design
• Performance — algorithmic regressions, memory leaks
• Testing — coverage gaps, hollow tests

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[Copilot]

Copilot reviewed 183 out of 183 changed files in this pull request and generated no comments.

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[github-actions]

Bundle size comparison

Base commit: 3474993fb48dc8919ff2570ac081a8e433e20148
Head commit: af7b9739be8a7e605aa4ebff47e5c8cc863717f3

Pending — Build - client packages is running. Results will appear here when the build completes.

[github-actions]

🔗 Found some broken links! 💔

Run a link check locally to find them. See Checking for Broken Links for more information.

linkcheck output

$ start-server-and-test "npm run serve -- --host 127.0.0.1 --no-open" http://127.0.0.1:3000 check-links
1: starting server using command "npm run serve -- --host 127.0.0.1 --no-open"
and when url "[ 'http://127.0.0.1:3000' ]" is responding with HTTP status code 200
running tests using command "npm run check-links"


> fluid-framework-website@0.0.0 serve
> docusaurus serve --host 127.0.0.1 --no-open

[SUCCESS] Serving "build" directory at: http://127.0.0.1:3000/

> fluid-framework-website@0.0.0 check-links
> linkcheck http://127.0.0.1:3000 --skip-file skipped-urls.txt

Crawling...

http://127.0.0.1:3000/docs/data-structures/tree/schema-evolution/feature-flag-schema-upgrades
- (72:12) 'isStaged..' => http://127.0.0.1:3000/docs/api/fluid-framework/treeviewalpha-interface#isstagedupgradeenabled-methodsignature (HTTP 200 but missing anchor)


Stats:
  338443 links
    2041 destination URLs
    2297 URLs ignored
       1 warnings
       0 errors

Error: Command failed with exit code 1: npm run check-links
    at makeError (/home/runner/work/FluidFramework/FluidFramework/website/node_modules/.pnpm/execa@5.1.1/node_modules/execa/lib/error.js:60:11)
    at handlePromise (/home/runner/work/FluidFramework/FluidFramework/website/node_modules/.pnpm/execa@5.1.1/node_modules/execa/index.js:118:26)
    at process.processTicksAndRejections (node:internal/process/task_queues:103:5) {
  shortMessage: 'Command failed with exit code 1: npm run check-links',
  command: 'npm run check-links',
  escapedCommand: '"npm run check-links"',
  exitCode: 1,
  signal: undefined,
  signalDescription: undefined,
  stdout: undefined,
  stderr: undefined,
  failed: true,
  timedOut: false,
  isCanceled: false,
  killed: false
}
[ELIFECYCLE] Command failed with exit code 1.