[Nim] Bfbs Nim Generator (#7534)

* Bfbs Nim Generator

* Remove commented out tests

* add missing line to idl.h

* Commit python reflection changes

* Commit python reflection changes and move tests

* Remove default string addition

* Move tests to python file

* Fix element size check when element is table

* remove whitespace changes

* add element_type docs and commit further to namer and remove kkeep

* Bfbs Nim Generator

* Remove commented out tests

* add missing line to idl.h

* Commit python reflection changes

* Commit python reflection changes and move tests

* Remove default string addition

* Move tests to python file

* Fix element size check when element is table

* remove whitespace changes

* add element_type docs and commit further to namer and remove kkeep

* remove unused variables

* added tests to ci

* added tests to ci

* fixes

* Added reflection type Field, Variable to namer

* Moved reflection namer impl to bfbsnamer

* Remove whitespace at end of line

* Added nim to generated code

* Revert whitespace removal

Co-authored-by: Derek Bailey <derekbailey@google.com>

tests/MoreDefaults.nim

@@ -0,0 +1,103 @@
+#[ MoreDefaults
+  Automatically generated by the FlatBuffers compiler, do not modify.
+  Or modify. I'm a message, not a cop.
+
+  flatc version: 22.9.29
+
+  Declared by  : 
+]#
+
+import Abc as Abc
+import flatbuffers
+
+type MoreDefaults* = object of FlatObj
+func intsLength*(self: MoreDefaults): int = 
+  let o = self.tab.Offset(4)
+  if o != 0:
+    return self.tab.VectorLen(o)
+func ints*(self: MoreDefaults, j: int): int32 = 
+  let o = self.tab.Offset(4)
+  if o != 0:
+    var x = self.tab.Vector(o)
+    x += j.uoffset * 4.uoffset
+    return Get[int32](self.tab, x)
+func ints*(self: MoreDefaults): seq[int32] = 
+  let len = self.intsLength
+  for i in countup(0, len - 1):
+    result.add(self.ints(i))
+func floatsLength*(self: MoreDefaults): int = 
+  let o = self.tab.Offset(6)
+  if o != 0:
+    return self.tab.VectorLen(o)
+func floats*(self: MoreDefaults, j: int): float32 = 
+  let o = self.tab.Offset(6)
+  if o != 0:
+    var x = self.tab.Vector(o)
+    x += j.uoffset * 4.uoffset
+    return Get[float32](self.tab, x)
+func floats*(self: MoreDefaults): seq[float32] = 
+  let len = self.floatsLength
+  for i in countup(0, len - 1):
+    result.add(self.floats(i))
+func emptyString*(self: MoreDefaults): string =
+  let o = self.tab.Offset(8)
+  if o != 0:
+    return self.tab.String(self.tab.Pos + o)
+  return ""
+func someString*(self: MoreDefaults): string =
+  let o = self.tab.Offset(10)
+  if o != 0:
+    return self.tab.String(self.tab.Pos + o)
+  return ""
+func abcsLength*(self: MoreDefaults): int = 
+  let o = self.tab.Offset(12)
+  if o != 0:
+    return self.tab.VectorLen(o)
+func abcs*(self: MoreDefaults, j: int): Abc.Abc = 
+  let o = self.tab.Offset(12)
+  if o != 0:
+    var x = self.tab.Vector(o)
+    x += j.uoffset * 4.uoffset
+    return Abc.Abc(Get[int32](self.tab, x))
+func abcs*(self: MoreDefaults): seq[Abc.Abc] = 
+  let len = self.abcsLength
+  for i in countup(0, len - 1):
+    result.add(self.abcs(i))
+func boolsLength*(self: MoreDefaults): int = 
+  let o = self.tab.Offset(14)
+  if o != 0:
+    return self.tab.VectorLen(o)
+func bools*(self: MoreDefaults, j: int): bool = 
+  let o = self.tab.Offset(14)
+  if o != 0:
+    var x = self.tab.Vector(o)
+    x += j.uoffset * 1.uoffset
+    return Get[bool](self.tab, x)
+func bools*(self: MoreDefaults): seq[bool] = 
+  let len = self.boolsLength
+  for i in countup(0, len - 1):
+    result.add(self.bools(i))
+proc MoreDefaultsStart*(builder: var Builder) =
+  builder.StartObject(6)
+proc MoreDefaultsAddints*(builder: var Builder, ints: uoffset) =
+  builder.PrependSlot(0, ints, default(uoffset))
+proc MoreDefaultsStartintsVector*(builder: var Builder, numElems: uoffset) =
+  builder.StartVector(4, numElems, 4)
+proc MoreDefaultsAddfloats*(builder: var Builder, floats: uoffset) =
+  builder.PrependSlot(1, floats, default(uoffset))
+proc MoreDefaultsStartfloatsVector*(builder: var Builder, numElems: uoffset) =
+  builder.StartVector(4, numElems, 4)
+proc MoreDefaultsAddemptyString*(builder: var Builder, emptyString: uoffset) =
+  builder.PrependSlot(2, emptyString, default(uoffset))
+proc MoreDefaultsAddsomeString*(builder: var Builder, someString: uoffset) =
+  builder.PrependSlot(3, someString, default(uoffset))
+proc MoreDefaultsAddabcs*(builder: var Builder, abcs: uoffset) =
+  builder.PrependSlot(4, abcs, default(uoffset))
+proc MoreDefaultsStartabcsVector*(builder: var Builder, numElems: uoffset) =
+  builder.StartVector(4, numElems, 4)
+proc MoreDefaultsAddbools*(builder: var Builder, bools: uoffset) =
+  builder.PrependSlot(5, bools, default(uoffset))
+proc MoreDefaultsStartboolsVector*(builder: var Builder, numElems: uoffset) =
+  builder.StartVector(1, numElems, 1)
+proc MoreDefaultsEnd*(builder: var Builder): uoffset =
+  return builder.EndObject()