build documentation for repr_v2 (#24325)

(cherry picked from commit 0806fb0b6f)

lib/system_overview.rst

@@ -9,6 +9,7 @@ is in separate files:
 * `assertions <assertions.html>`_
 * `dollars <dollars.html>`_
 * `ctypes <ctypes.html>`_
+* `repr_v2 <repr_v2.html>`_
 
 
 Here is a short overview of the most commonly used functions from the

tools/kochdocs.nim

@@ -198,11 +198,11 @@ proc getDocList(): seq[string] =
   # don't ignore these even though in lib/system (not include files)
   const goodSystem = """
 lib/system/nimscript.nim
-lib/system/assertions.nim
 lib/system/iterators.nim
 lib/system/exceptions.nim
 lib/system/dollars.nim
 lib/system/ctypes.nim
+lib/system/repr_v2.nim
 """.splitWhitespace()
 
   proc follow(a: PathEntry): bool =