finalize version 1

[o7Moon]

TODO:

• implementation in LRO (of at least base.*, but ideally everything required for trk and layers as well)
• • base.*
• • everything else
• preferably get opinions from more implementations, whether they be a .com mod or a small track converter program or something else
• • malizma's .com mod
• • sol2lrb
• improve writing
• remove reference to proposal doc
• change the version number to 1 to reflect the finalization

[Malizma333]

Also, include metadata and/or dependencies for mods in the spec, as discussed here:
Malizma333/lr-formatter-rs#1 (comment)
Malizma333/lr-formatter-rs#1 (comment)