Re-added the 'asterisk' neomorpheme paradigm tagset mapping for reproducibility

# Why is the change needed?

**This change was originally included in a different MR, but it was erroneously discarded.**

The original paper used two neomorpheme paradigms: 'schwa' and 'asterisk'.
Currently, the repository only includes a tagset mapping for the 'schwa' neomorpheme paradigm.
This change introduces `asterisk.json`, i.e. the tagset mapping for the 'asterisk' paradigm in JSON format, for reproducibility purposes.
With this addition, we make both versions of Neo-GATE used in the original paper reproducible.

`asterisk.json` also serves as a further exemplar tagset mapping.

# What changes does the patch introduce?

The patch adds the `asterisk.json` file to the repository.

# How was this patch tested?

No tests are required.

asterisk.json

@@ -0,0 +1,38 @@
+{
+    "<ENDS>": "*",
+    "<ENDP>": "*",
+    "<DARTS>": "l*",
+    "<DARTP>": "l*",
+    "<IART>": "un*",
+    "<PARTS>": "de*",
+    "<PARTP>": "de*",
+    "<PRON>": "l*i",
+    "<PREPdiS>": "dell*",
+    "<PREPdiP>": "dell*",
+    "<PREPaS>": "all*",
+    "<PREPaP>": "all*",
+    "<PREPdaS>": "dall*",
+    "<PREPdaP>": "dall*",
+    "<PREPinS>": "nell*",
+    "<PREPinP>": "nell*",
+    "<PREPsuS>": "sull*",
+    "<PREPsuP>": "sull*",
+    "<DADJquelS>": "quell*",
+    "<DADJquelP>": "quell*",
+    "<DADJquestS>": "quest*",
+    "<DADJquestP>": "quest*",
+    "<POSS1S>": "mi*",
+    "<POSS1P>": "mi*",
+    "<POSS2S>": "tu*",
+    "<POSS2P>": "tu*",
+    "<POSS3S>": "su*",
+    "<POSS3P>": "su*",
+    "<POSS4S>": "nostr*",
+    "<POSS4P>": "nostr*",
+    "<POSS5S>": "vostr*",
+    "<POSS5P>": "vostr*",
+    "<PRONDOBJS>": "l*",
+    "<PRONDOBJP>": "l*",
+    "<PRONIOBJS>": "l*",
+    "<PRONIOBJP>": "l*"
+}