Plover implementation of Spanish Melani system

Based on https://gist.github.com/sammdot/84c601404c6a74c0895c294ab4b818be

Originally worked from the implementation by Sonsoles García Martín, Noelia Ruiz Martínez used at MQD, I later adopted basically wholesale the implementation by Benoit Pierre in the opensteno repo, making the necessary Spanish adaptations as above.

My intention is to provide a simpler, less optimized, less opinionated Melani system implementation for Spanish in Plover, even if it's ultimately less powerful, so to be a reference based on what publicly-available documentation there is.

I am not a professional stenographer. This is a learning project for me. If anyone has Melani documentation for Spanish, I would only be too happy to make changes.

Decisions

The Melani system in the reference uses the eo chord sometimes to mark "-os" and sometimes to mark a translations as ending with a consonant. This "-os" outputting function was shared with ieao, and there wasn't an obvious pattern explained where I could find. Some analysis of the example text might reveal some ergonomic principle. I decided to keep eo as "-os" only, for symmetry with ia ("-as"). For consonant-final words I decided to use ao, formerly used for "u", which is a much rarer ending. "u" is instead done by "ieao", a chord seemingly not elsewhere employed.

Layout

Other combinations not covered:

Initial consonants:

• bl — PTHVR
• ch — CH
• dr — THR
• fl — THVR
• gu — PCH
• h — SCH
• j — PCT
• ll — HRhr/
• ps — Ps/
• qu — PCTHVR (i.e. all non-S keys)
• x — SPCTH

Medial vowels

• ue — IAEO
• Accent with added *

Final consonants

• j — csh
• nt — cp
• sm — sr
• x — csthpr (i.e. all non-vowel keys)