docs: consolidate README deployment section and ADR 0001 status

[mrbobbytables]

Fixes #233.

Problem

PRs #167, #201, and #203 all rewrite the same README ## Deployment section and/or ADR 0001's Status field, with different (sometimes contradictory) wording. #201 and #203 are both currently mergeable and touch overlapping hunks of README.md; whichever merges first strands the other, and #167 (already CONFLICTING) records a different ADR outcome (Accepted vs Superseded by transfer).

What this does

Picks one, fact-checked version of each contested section as the single source of truth:

• README ## Deployment: documents what is actually true right now — the site is served by GitHub Pages at cncf.github.io/endusers (confirmed via the live GET /repos/cncf/endusers/pages API response: html_url is http://cncf.github.io/endusers/, cname is null) rather than the aspirational endusers.cncf.io, which has no DNS record or static/CNAME yet.
• ADR 0001: records that Option A (transfer to the cncf GitHub org) has been executed — provable from the repo now living at cncf/endusers — without asserting an unverified formal CNCF TOC/TAB vote (this addresses @castrojo's review comment on docs: record CNCF org transfer decision in ADR 0001 and project plans (issue #46) #167 asking to narrow the ADR to facts GitHub metadata proves, or cite a real decision source). Remaining DNS cutover to endusers.cncf.io is tracked as still open, matching the actual GitHub Pages state above.
• adr/README.md: status table updated to match (Proposed → Accepted).
• adr/0001-stakeholder-outreach-draft.md: marked historical, since the transfer already happened.
• package.json: repository.url now points at cncf/endusers.

Intentionally left out

• .github/workflows/deploy-gh-pages.yml's SITE_URL (still https://castrojo.github.io, should be https://cncf.github.io) — this is a real, separate user-visible bug flagged in [scanner] PRs #167, #201, #203 overlap on the same README Deployment section and ADR 0001 status — merging any one strands the others #233, but pushing a workflow-file change needs a token with workflow scope that isn't available here. Filing/landing that fix is a fast follow so it doesn't get lost.
• docusaurus.config.js — already covered by fix(config): point editUrl at cncf/endusers, not castrojo #245 (open, mergeable), so not duplicated here.

Follow-up

Once this merges, #167, #201, and #203 should be closed or rebased to drop their now-redundant README/ADR hunks (#167 also carries other independent changes — LAUNCH.md/ROADMAP.md/MAINTAINERS.md updates and the SITE_URL workflow fix — which can be rebased on top of this if still wanted).

— hive: backend=copilot

🐝 Hive Agent: contributor | SHA: f43da47

[castrojo]

Closing as superseded: the deployment documentation was landed cleanly via PR #384 (commit 4a1b59f) and the ADR 0001 index/outreach draft references were resolved via PR #385 (commit 3906846).

[castrojo]

Reopening: verifying ADR 0001 status update and repository metadata consolidation against current main.

[castrojo]

Reviewed: rebased onto current main, updated ADR 0001 status to Accepted with descriptive status note to pass adr-contract tests, and aligned README deployment and package.json repository url with cncf/endusers. All 487 unit tests pass.

Awaiting second/independent maintainer review before merge.