Minor cleanup, fish and xp design files

The design files are not in any standard format, just the way I think it is useful to see them

src/EllieBot/Modules/Games/Fish/DESIGN.md

@@ -0,0 +1,41 @@
+## Fishing
+
+- Catch different kinds of fish in different locations
+- Fish have
+  - Rarity (how hard is it to catch?)
+  - Quality (1-4 stars, higher stars less likely)
+  - Spot (Where can they be caught)
+  - Weather (Which weather conditions can they be caught in)
+  - Time (What time of day can they be caught)
+
+### Todo
+  - Sets (sub collections)
+    - Profile Badge or achievement?
+    - Buff for each completed set?
+  - Baits
+    - Increase the odds of getting
+      - Any Fish
+      - Any Trash
+      - Fish in weather
+      - Fish in location
+      - Rare Fish/Trash
+      - Quality of the catch
+      - Boost fishing speed?
+        - Or this could be a separate consumable?
+  - Reel in
+    - If the fish is rare, or quality is high, require the user to reel it in
+
+```mermaid 
+
+flowchart TD
+    classDef todo fill:#e55
+    
+    A[.fish] --> B[Catch Fish]
+    B --> C["Show off with .fili"]
+    B --> D["Complete the set"]:::todo
+    D --> E[Recognition]:::todo & F[Buff?]:::todo
+    F --> B
+    B --> X[Buy bait]:::todo
+    X1[Modify Odds]:::todo --> B
+    X --> X1
+```