feat: add form-*, skd-*, misc tests (batches 1, 2, 10)

New skills covered:
- form-add, form-compile, form-validate, form-info (batch 1)
- skd-compile, skd-validate, skd-info (batch 2)
- help-add, template-add, template-remove, meta-remove (batch 10)

Findings: form-add/form-info path resolution inconsistency,
meta-remove self-reference requires -Force.

45 tests across 33 skills, all passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/skills/cases/help-add/basic.json

@@ -0,0 +1,10 @@
+{
+  "name": "Добавление справки к обработке",
+  "preRun": [
+    {
+      "script": "epf-init/scripts/init",
+      "args": { "-Name": "МояОбработка", "-SrcDir": "{workDir}" }
+    }
+  ],
+  "params": { "objectName": "МояОбработка" }
+}