Missing codepoints in our Glyphsets WIP

Working on the subsetting of Playpen Sans pers script fonts, I've noticed some of the codepoints are not included in any of our Glyphsets.

After cross-referencing the Glyphsets with the gflanguages definitions, I've seen most cases correspond to auxiliary glyphs.

However, I'll collect the auxiliary plus other extra ones I'm identifying here so we can review them later on.

| Codepoint | Glyph |Language | Comment|
|---|---|---|---|
| 0132 | IJ | nl_Latn | Auxiliar glyph for this language |
| 0133 | ij | nl_Latn | Auxiliar glyph for this language |
| 017F| longs | fr_Latn | Auxiliar glyph for this language |
| 013F | Ldot | ca_Latn | Auxiliar glyph for this language |
| 0138 | kgreenlandic | kl_Latn | Auxiliar glyph for this language |
| 0312 | commaturnedabovecomb | lv_Latn | necessary for `gcommaaccent` part of Latn Core |
| FB01 | fi liga | NA| Previously in old Latin Plus |
| FB02 | fl liga | NA | Previously in old Latin Plus |
| 00A4 | currency | NA | Previously in old Latin Plus |
| 2009 | thinspace | NA | Could be part of GF Plus |
| 25CC | dottedCircle | NA | It's a requested glyph but is not included in any Glyphset |

Start with the codepoint table in this issue and cross-reference each entry against the Glyphsets and gflanguages definitions. Review which auxiliary and extra glyphs should be included, then document a clear inclusion decision for every listed codepoint.

Written by the indexing model from the issue text.