(cherry picked from commit 090ac88)

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(cherry picked from commit 0f56b16)

(cherry picked from commit 1777b99)

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* Build: restore main build

* Config: align model compat schema

(cherry picked from commit 4ca87fa)

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(cherry picked from commit 8d805a0)

Restore files that were incorrectly deleted by cherry-picks:
- group-mentions.ts (still used by telegram/whatsapp plugin-sdk)
- onboarding/imessage.ts, onboarding/signal.ts (still referenced)
- actions/signal.ts (runtime still imports from old location)
- signal/index.ts (restore fork base version)

Remove upstream-only files that don't compile in fork:
- extensions/microsoft/ (new TTS extension, needs upstream infra)
- src/plugin-sdk/extension-shared.ts (references deleted channel-runtime)
- src/tts/provider-types.ts, providers/microsoft.ts (upstream TTS types)

Restore base versions of files incorrectly modified:
- types-core.ts, provider-registry.ts, zod-schema.core.ts
- Various test files (subpaths.test, setup-helpers.test, tts.test)

- Rename openclaw/plugin-sdk -> remoteclaw/plugin-sdk in all extensions
- Rename OpenClawConfig -> RemoteClawConfig, OpenClawPluginApi -> RemoteClawPluginApi
- Remove upstream-only files (gateway onboard, signal message-actions copy)
- Add explicit any annotations to setup wizard callback params for TS strictness

…rrors

- Remove setup-surface.ts files referencing non-existent setup-wizard module
- Remove nextcloud-talk setup-core.ts (references missing patchScopedAccountConfig)
- Remove memory-lancedb api.ts (gutted extension)
- Stub ChannelSetupWizard type in imessage setup-core.ts
- Restore whatsapp resolve-target.test.ts and signal channel.test.ts from base
- Restore config.plugin-validation.test.ts from base
- Remove setup-surface re-export from imessage channel.runtime.ts

- Remove elevenlabs extension (requires upstream speech provider API)
- Remove googlechat runtime-api.ts (references upstream-only modules)
- Rename openclaw.plugin.json -> remoteclaw.plugin.json in new extensions
- Remove imessage/mattermost/signal setup-surface.ts (require setup-wizard)

- Restore googlechat/imessage test files with correct import paths
- Restore imessage channel.ts and shared.ts from fork base
- Fix imessage monitor test import paths for extensions/ directory
- Remove line group-policy files (reference non-existent plugin-sdk modules)

- Restore matrix send-queue.test.ts (referenced deleted extension-shared)
- Restore mattermost channel.ts (referenced deleted onboarding.js)
- Fix unreachable ?? in line setup-core.ts

Cherry-pick 6 copied src/imessage/ files to extensions/imessage/src/ but
the originals remain in src/imessage/. The build system uses rootDir='src'
which can't compile files under extensions/ that import each other.
Remove the copies, keep only test files and channel.ts.

Cherry-pick 6 moved src/imessage/ to extensions/imessage/src/ and updated
src/ files to re-export from extensions/. The fork's build system uses
rootDir='src' which can't handle cross-imports between extensions/ files.

Restoring all src/imessage/ files to fork base versions and removing
extension copies that can't compile independently.