chore(knowledge): adiciona o Knowledge Workspace como submodule

Documentacao oficial em knowledge/ (submodule de docs-ia-projects, branch
main). Path knowledge/ e nao docs/ porque tres repositorios ja tem docs/
proprio ainda nao migrado.

Clone: git clone --recurse-submodules
Atualizar: git -C knowledge pull origin main && git add knowledge

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "knowledge"]
+	path = knowledge
+	url = git@github.com:Move-System/docs-ia-projects.git
+	branch = main

knowledge

@@ -0,0 +1 @@
+Subproject commit 3632bab0ef5ad3df84d9e0519df6768cc379e2c4