feat(developer): kmc-generate and kmc-copy consolidation

[mcdurdin]

Consolidating TODO lists from #11014, #12555

TODO for kmc-generate, from #11014

• Add KB article on migrating from KMFL to Keyman for Linux help.keyman.com#1335 -- update kmconvert ref
• validate targets (basic-generator.ts TODO-GENERATE)
• additional validation of ids for keyboard and model filenames (e.g. casing)
• documentation --> docs(developer): kmc-generate #12647
• generate icons (keyman-keyboard-generator.ts TODO-GENERATE, also tests)
• additional test for transform (test-basic-generator.ts TODO-GENERATE)
• UI in Keyman Developer (to replace existing kmconvert-based systems)
• version for ldml keyboard should be default 1.0.0, not 1.0
• lexical model help says 'keyboard' for name, version, author

TODO for kmc-copy, from #12555

• documentation --> added to feat(developer): add GitHub and Cloud support to kmc-copy #12586, just cloud docs reqd)
• support rename (--rename flag) in-place, or remove the function (TODO-COPY)
• verbose mode support (TODO-COPY)
• relocation of external files into project structure from filesystem (TODO-COPY)
• validate dirname of output folder is a valid id for the project type (TODO-COPY)
• check for file collisions when copying project folders (TODO-COPY)
• additional testing (TODO-COPY)
• copying disorganized projects into current structure, +test (TODO-COPY)
• copy all files in the folder and subfolders from cloud sources, even when using a 1.0 project type (also for github sources?)
• UI in Keyman Developer

[mcdurdin]

Moving remaining TODO items here to January