chore: drop stray files from docs branch, ignore main-branch leakage

bun.lock, .codeanalyzer/, and a test fixture cache were accidentally
committed (left in the shared working tree after building on main).
Remove them and gitignore the paths so a future 'git add -A' on docs
can't re-add them.

Author: rahlk

.codeanalyzer/analysis_cache.json

@@ -19,3 +19,8 @@ pnpm-debug.log*
 
 # cache
 .cache/
+
+# stray files that can leak in from the `main` branch (shared working tree)
+bun.lock
+.codeanalyzer/
+/test/