[main]: Add mdp to lecture notes

docs/lectures/mdp/18_revision.md

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+# Revision
+
+### Exam
+
+- 24 hours
+    - Meant to take around 1 hour
+- Marked out of 45
+- Answer **all** questions
+
+##### Knowledge
+
+- Bookwork, recall of factual information
+    - State, provide
+- Not many of these, as the exam is open-book
+
+##### Comprehension
+
+(demonstrate understanding)
+
+- Students are asked to perform actions like
+    - Describe, explain, classify ideas/concepts
+    - In your own words
+
+##### Application
+
+- Undertake an *unseen* task by using knowledge in a new way