test(11.1-07): planted fixtures and unit tests for fence, execution and name-form holes

- eighteen violation plants pin nested src=, Go aliases, unrun examples, build membership and command forms
- unit tests cover fence collection, captions, goLang, go doc -c, commandWord and Sync

internal/docsite/testdata/violations/identifier-wrong-case/modules/demo/open.go

@@ -0,0 +1,4 @@
+package demo
+
+// OpenFromApp is a fixture.
+func OpenFromApp() {}