Create misc_events.md

Not sure where these would make sense in the documentation.

docs/events/misc_events.md

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+# Misc. Events
+
+This file contains event IDs that haven't been sorted into other files, and might later be moved into a more specific category.
+
+- **[34] Start point**
+  - Spawns Erina here.  In custom maps, the game will look for this event in area0.map
+
+- **[42] Auto save**
+  - When Erina passes this event, the game triggers an autosave.  Autosave is then disabled until Erina passes an autosave reset event.
+
+- **[44] Auto save reset**
+  - When Erina passes this event, auto save events are reenabled.
+
+- **[45] Heal point**
+  - Spawns a glowing heal point.  When Erina stands near this, her HP recovers.
+
+- **[224] Save point**
+  - Spawns a save point.  Typically built in a 2 wide by 3 tall rectangle, rising up above the ground.
+
+- **[250] Easter egg**
+  - Spawns an easter egg item.