feat: Add lingma support (#2348)

* add lingma support

* fix

* fix context file

* Update CONTEXT_FILE path in test integration

* fix IntegrationOption.default

* fix IntegrationOption.defaultfix

* fix: address Copilot review feedback

- Add blank line after __future__ import (PEP 8)
- Remove trailing whitespace at end of lingma/__init__.py
- Bump integrations/catalog.json updated_at timestamp
- Add Lingma to supported agent list in README.md

* fix: address Copilot review feedback (round 4)

- Reword module docstring: Lingma is a brand-new skills-only integration
  with no prior command-mode history, so 'deprecated since v0.5.1'
  wording (copied from Trae) was misleading
- Remove Lingma from README CLI-tool check list: Lingma is IDE-based
  (requires_cli=False) and is explicitly skipped by specify init /
  specify check tool detection

src/specify_cli/integrations/__init__.py

@@ -66,6 +66,7 @@ def _register_builtins() -> None:
     from .kilocode import KilocodeIntegration
     from .kimi import KimiIntegration
     from .kiro_cli import KiroCliIntegration
+    from .lingma import LingmaIntegration
     from .opencode import OpencodeIntegration
     from .pi import PiIntegration
     from .qodercli import QodercliIntegration
@@ -97,6 +98,7 @@ def _register_builtins() -> None:
     _register(KilocodeIntegration())
     _register(KimiIntegration())
     _register(KiroCliIntegration())
+    _register(LingmaIntegration())
     _register(OpencodeIntegration())
     _register(PiIntegration())
     _register(QodercliIntegration())