feat(forge): pluggable forge abstraction + GitLab and Gitea/Forgejo/Codeberg (#1913)

* refactor(forge): forge-neutral foundation (GitHub-only)

Decouple git-hosting from GitHub behind a neutral abstraction (issue #1616), GitHub-only for now; existing GitHub behaviour is unchanged.

- Forge manifest, neutral ForgeService contract, forge registry + resolver, and a client forge-module registry.
- GitHub code renamed to the neutral shape; PR/Issue attachment wording preserved.
- forge.search.response enums parse tolerantly (unknown kind/auth state degrade instead of breaking the client).
- createPullRequest reports typed CLI/auth errors instead of a generic message.
- forge-resolver host/remote caches are LRU-bounded.
- Forge host trust is explicit: only a known cloud host or a CLI-authenticated host is ever talked to; an unauthenticated GitHub Enterprise host fails resolution instead of routing to github.com.
- Docs: forge-providers guide, glossary and i18n forge-copy conventions, architecture and rpc-namespacing terminology.
- Vitest React Native mocks (unistyles, svg, linking, lucide) consolidated into shared aliased test-stubs.

* feat(forge): GitLab adapter, forge-aware UI, pipelines and approvals

GitLab adapter over the glab CLI on the neutral contracts: MR status, forge-aware UI, pipeline tree, and N-of-M approvals.

- threadIsResolved is part of the neutral timeline item.
- Pipeline load failures show an error instead of an empty section.
- Manual pipeline jobs render as pending.
- Fork/detached MR head pipelines are fetched by MR iid (glab ci get --merge-request).

* feat(forge): Gitea family adapter (Gitea, Forgejo, Codeberg)

One adapter over the tea CLI serving Gitea, Forgejo, and Codeberg on the neutral contracts.

- CI status aggregates commit statuses and Actions runs together.
- Gitea's terminal "warning" state maps to failure on server and client.
- Gitea Actions check details are reachable from the PR pane by workflowRunId.

* refactor(forge): localize compatibility handling

* test(forge): expect normalized GitLab facts

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/app/src/git/pull-request-panel/native-data.ts

@@ -0,0 +1,34 @@
+/**
+ * Compatibility exports for tests and non-visual derivations. Rich PR-pane
+ * contributions now come from client forge modules and validate the open
+ * `forgeSpecific` envelope at runtime.
+ */
+import type { CheckoutPrStatusResponse } from "@getpaseo/protocol/messages";
+import type { Forge } from "@/git/forge";
+import { CLIENT_FORGE_LOGIC_MODULES } from "@/git/forges";
+import type { PrPaneCheck } from "./data";
+
+type CheckoutPrStatus = NonNullable<CheckoutPrStatusResponse["payload"]["status"]>;
+
+const CLIENT_NATIVE_FALLBACK_CONTRIBUTIONS = CLIENT_FORGE_LOGIC_MODULES.flatMap(
+  (module) => module.facts?.nativeFallbackChecks ?? [],
+);
+
+/**
+ * Fallback check rows for a status whose forge reports no individual checks.
+ * Returns [] for forges that don't synthesize one.
+ */
+export function getNativeFallbackChecks(status: CheckoutPrStatus, forge: Forge): PrPaneCheck[] {
+  const facts = status.forgeSpecific;
+  if (!facts) {
+    return [];
+  }
+  const checks: PrPaneCheck[] = [];
+  for (const contribute of CLIENT_NATIVE_FALLBACK_CONTRIBUTIONS) {
+    const check = contribute.contribute(facts, status, forge);
+    if (check) {
+      checks.push(check);
+    }
+  }
+  return checks;
+}