Add contrib. prompt library (#927)

* Initial prompt library

Signed-off-by: Claudio Spiess <[email protected]>

* Documentation and fixes

Signed-off-by: Claudio Spiess <[email protected]>

* Finish prompt lib docs

Signed-off-by: Claudio Spiess <[email protected]>

* Address feedback

Signed-off-by: Claudio Spiess <[email protected]>

---------

Signed-off-by: Claudio Spiess <[email protected]>

Author: claudiosv

contrib/prompt_library/ReAct.pdl

@@ -72,7 +72,7 @@ defs:
           data: False
         - def: tool_names
           contribute: []
-          data: ${ tool_schema|map(attribute='name')|list }
+          text: ${ tool_schema|map(attribute='name')|list }
         - repeat:
             text:
               - "\nTho: "