Anchor errors

Getting some weird errors when building UFO with ligatures exported from FontCreator that has only one anchor but a different name than what's exported in features.fea.

[f_f.txt](https://github.com/user-attachments/files/20265651/f_f.txt)

```log
DEBUG own: Glyph name: f_f
DEBUG own: NamedAnchor __init__: aboveLC_ligComponent_0 610 742 None None
ERROR:root:In 'CactusClassicalSerif-Regular.ufo': Compiling UFO failed: ligature component indexes must start from 1
Traceback (most recent call last):
File "C:\Python311\Lib\site-packages\fontmake\font_project.py", line 519, in _iter_compile
yield compile_func(ufo, debugFeatureFile=debugFeatureFile, **options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\__init__.py", line 117, in compileOTF
return OTFCompiler(**kwargs).compile(ufo)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\_compilers\baseCompiler.py", line 65, in compile
self.compileFeatures(ufo, font, glyphSet=glyphSet)
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\_compilers\baseCompiler.py", line 145, in compileFeatures
otFont = featureCompiler.compile()
^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\featureCompiler.py", line 148, in compile
self.setupFeatures()
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\featureCompiler.py", line 315, in setupFeatures
writer.write(self.ufo, featureFile, compiler=self)
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\featureWriters\baseFeatureWriter.py", line 150, in write
self.setContext(font, feaFile, compiler=compiler)
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\featureWriters\markFeatureWriter.py", line 349, in setContext
ctx.anchorLists = self._getAnchorLists()
^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\featureWriters\markFeatureWriter.py", line 388, in _getAnchorLists
a = self.NamedAnchor(name=anchorName, x=x, y=y, libData=libData)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\User\AppData\Roaming\Python\Python311\site-packages\ufo2ft\featureWriters\markFeatureWriter.py", line 207, in __init__
raise ValueError("ligature component indexes must start from 1")
ValueError: ligature component indexes must start from 1

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Python311\Lib\site-packages\fontmake\__main__.py", line 746, in main
project.run_from_ufos(
File "C:\Python311\Lib\site-packages\fontmake\font_project.py", line 1374, in run_from_ufos
self.build_otfs(ufos, cff_version=cff_version, inplace=inplace, **kwargs)
File "C:\Python311\Lib\site-packages\fontmake\font_project.py", line 315, in build_otfs
self.save_otfs(ufos, **kwargs)
File "C:\Python311\Lib\site-packages\fontTools\misc\loggingTools.py", line 375, in wrapper
return func(*args, **kwds)
^^^^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\fontmake\font_project.py", line 682, in save_otfs
for font, ufo in zip(fonts, ufos):
File "C:\Python311\Lib\site-packages\fontmake\font_project.py", line 521, in _iter_compile
raise FontmakeError("Compiling UFO failed", ufo.path) from e
fontmake.errors.FontmakeError: In 'CactusClassicalSerif-Regular.ufo': Compiling UFO failed: ligature component indexes must start from 1
```

Reproduce the UFO build using the attached f_f.txt and the fontmake traceback. Start in ufo2ft/featureWriters/markFeatureWriter.py, especially NamedAnchor and _getAnchorLists, to trace the anchor name and component index handling. Done means the reported ligature-anchor input no longer fails with the shown ValueError.

Written by the indexing model from the issue text.