docs: help Cap 8 readers find live-update options beyond the exclusivity claim

[TorichanCapgo]

Why this matters for Ionic customers

A growing set of Capacitor customers are on Capacitor 8 and still need remote live updates. Some teams are planning what comes next for their delivery pipeline.

Those customers land on the Capacitor guides. Today ci-cd.md tells them Appflow is the only service that can do remote live updates. That sentence is inaccurate, and it leaves people who must move (or who already use a community plugin) with a dead end in the official docs.

This PR is meant to make that path clearer for your readers, without changing how Appflow is presented as Ionic’s official option.

What stays the same

• All existing Appflow sections, CTAs, and get-started copy
• Appflow as Ionic’s official live-update / Mobile DevOps recommendation

What changes

1. ci-cd (main + v8) — replace only the exclusivity sentence so customers are not told Appflow is the sole option.
2. deploying-updates (main + v8) — leave the Appflow guide intact; add one short factual sentence after it.
3. plugins/community (main + v8) — add a Capgo subsection next to the other community plugin orgs already listed, so customers who need a community option can find it from the docs they already trust.

Ask

Happy to trim further (for example Capgo named only under plugins/community) if that is easier for maintainers to ship.

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[TorichanCapgo]

Friendly bump for Cap 8 readers still landing on the “Appflow is the only service” line in the CI/CD guide.

Ionic’s own support article already lists Capgo next to Capawesome under live-update alternatives (Native Builds and Live Updates), so this PR is only aiming to stop the official Capacitor guides from contradicting that.

Happy to trim further (ci-cd exclusivity sentence only, or Capgo under plugins/community only) if that is easier to ship. Appflow walkthroughs and CTAs stay untouched.

[TorichanCapgo]

Rebased onto latest main so this stays mergeable.

Still only targeting the false “only service” exclusivity in the CI/CD guide (Appflow walkthroughs/CTAs untouched). Happy to shrink further to that one sentence if that helps review.