doc: add notes.md (stale)

doc/notes.md

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+# Heck Orca Notes
+
+* `G` and `X` are redundant
+* Ideas: `H` 
+    * `H` if banged -> dont halt. `h` banged -> do halt 
+    * Halt whole area, like: `xyh`
+    * maybe extend that with even number of frames it will be halted like 'xyht'
+
+* "Output" operators should start and end with the mnemonic, so they can be banged from boh sides (think west) like `;13C;`
+* is `t` unused? 
+* Make variables persistent a across frames (use results at the "end/bottom" the code in the next frame easily
+* Continuous bangs not working, need interleave
+
+
+#### Fork Name Candiates
+* SpaceFish
+*