docs(readme): add restrained star + issue CTA below tagline (#79)

* docs(install): remove false symlink claim, fix Anonymous mode startup command

Three doc inaccuracies surfaced during fresh-state install testing on Pi231 +
MacBook (Round 1+2):

1. README §Server Setup claimed setup.mjs "Symlink `ocp` to /usr/local/bin for
   CLI access" — false. setup.mjs writes start.sh + plist/systemd unit but
   creates no PATH symlink. Removed the line; added a short PATH tip showing
   the user's options (manual symlink to ~/.local/bin or /usr/local/bin, or
   shell alias) right after the install summary.

2. README §Anonymous Access told users to run `ocp start` to enable the
   feature — there is no `ocp start` subcommand. Available commands are
   restart / stop / status / logs / keys / usage / update / lan / health /
   clear / settings (verified via `~/ocp/ocp` enumeration). Replaced with
   the correct flow: export PROXY_ANONYMOUS_KEY, then `node setup.mjs
   --bind 0.0.0.0 --auth-mode multi`.

3. The same paragraph implied that exporting PROXY_ANONYMOUS_KEY in an
   interactive shell is enough to enable anonymous access — but the running
   proxy is auto-started by launchd/systemd from the service unit's own
   env, not from the user's shell. Spelled this out and noted that if OCP
   was installed before exporting the env var, the user must re-run
   setup.mjs (idempotent) so the service unit env is refreshed, then
   `ocp restart`.

The PROXY_ANONYMOUS_KEY mechanism described becomes 100% accurate when
PR B (`fix/setup-inject-service-env`, sibling PR) lands; current setup.mjs
on main does not yet inject this env into the service unit.

Doc-only — no `server.mjs` change, no version bump, no `cli.js` citation
required.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* docs(readme): add restrained star + issue CTA below tagline

A single italic line under the existing personal-note italic, asking
readers to ⭐ the repo if they get value, and to file issues — framed
explicitly as "issues are even more useful than stars" so the CTA reads
as feedback-seeking rather than vanity-metric chasing.

Tone matches the rest of README: low-key, single-maintainer self-deprecating,
no marketing voice. No "save money / free / $0" verbiage. Coexists with the
existing buy-me-a-coffee personal-note line above it (different ask:
funding vs. social-proof).

This is doc-only. ALIGNMENT.md Rule 5 (cli.js citation) does not apply.
Same pattern as #68 / #69 / #71 / #78.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

README.md

@@ -6,6 +6,8 @@
 
 *Open source from day one, used daily by my family, maintained on nights and weekends. If OCP saves you money too, you can [☕ buy me a coffee](https://buymeacoffee.com/dtzp555) — [full story below](#support-ocp).*
 
+*If OCP saves you a setup, a ⭐ helps other folks discover it. Issue reports are even more useful — that's the highest-quality feedback this project gets.*
+
 OCP turns your Claude Pro/Max subscription into a standard OpenAI-compatible API on localhost. Any tool that speaks the OpenAI protocol can use it — no separate API key, no extra billing.
 
 ```