@KayraG has deleted the (only 1 git commit ever, etc.) old package that (#2519)

Nim's packages list knew before this PR as "nio".

In the meantime, for almost 2 years, I have been also been maintaining &
regularly releasing another package also called "nio" ("like HDF5 but
even simpler" & with an agenda / attitude to stay "simple" and related
tools to make extract-transform-loader / ETLs into this the format from
compressed xSV, etc. - hence the numerous tags).

There may be more apt names like "Cio" to relate it more directly to its
"C" FFI/"FDI" (foreign data interface - to the extent the two are even
distinct) origins or less-colliding-with-anything-in-any-context names
like "Jio" or "nim-nio".  Personally, I have used this simpler name for
the vague idea since 2002-2004, and I've referenced it in Nim-land in
Forum posts and elsewhere.  (I even considered asking KayraG to drop or
rename their package, but did not get around to it before the deletion.)

So, the "confusion minimizing path" is to keep my package named "nio"
and re-target the Nim packages list to point at it which is exactly what
this PR does.  Then "nimble install nio" can maybe "just work".

packages.json

@@ -568,18 +568,51 @@
   },
   {
     "name": "nio",
-    "url": "https://github.com/KayraG/nio",
+    "url": "https://github.com/c-blake/nio",
     "method": "git",
     "tags": [
-      "server",
-      "framework",
-      "express",
-      "http",
+      "mmap",
+      "memory-mapping",
+      "binary data",
+      "data compiling",
+      "data debugging",
+      "serialize",
+      "serialization",
+      "deserialize",
+      "deserialization",
+      "marshal",
+      "unmarshal",
+      "marshalling",
+      "dataframe",
+      "file arrays",
+      "file format",
+      "file extension convention",
+      "hdf5",
+      "ndarray",
+      "multidimensional-array",
+      "string interning",
+      "open architecture",
+      "column-oriented",
+      "row-oriented",
+      "database",
+      "timeseries",
+      "headerless teafiles",
+      "DBMS",
+      "tables",
+      "SQL",
+      "CSV",
+      "TSV",
+      "extract-transform-load",
+      "ETL",
+      "magic number-keyed decompressor",
+      "command-line",
+      "data engineering",
+      "pipelines",
       "library"
     ],
-    "description": "A Mini Server Framework for Nim language",
+    "description": "Low Overhead Numerical/Native IO library & tools",
     "license": "MIT",
-    "web": "https://github.com/KayraG/nio"
+    "web": "https://github.com/c-blake/nio"
   },
   {
     "name": "decisiontree",