Checklist for 2025.12

[arkiuat]

Improvements:

• Improve help message wrt --optimize [04a36dd1]
• Support Unicode 17 (up from 15) [4d62268a][1e66a50c]
• varargs logic updates [f4cb406b][159288a3]

Fixes:

• Cleanup for installing scripts on win [cd3b612c][635279c8]
• Normalize rakudo-home path in script wrappers [ee706010]
• Fixed several issues with loading of precompiled files from different threads [b85fb8c0][002dac33][040d145a]
• Fix memory issue in script runner [bed55b51][2d4a8c83]
• Make CORE.c setting build reproducibly [5154f2a1]
• Fix bug in one(...).defined [5a742811]

Additions:

• Add variable number of arguments (varargs) support to NativeCall [488783a7][61f09188][7a302e08][820a4a94]
• Add support for pseudo-terminals (PTY) [1d6aae34][029cb9fd][1dfd3b5e] [f347d084][e246fc23][fd386dbc][81a6e768]

RakuAST:

• fix issue with role composition [3e9f2527]
• allow "constant" to be localizable [6b47541e]
• fix subset type defaults in containers [bb4e88a2]
• allow ≔ (2254 COLON EQUALS)as a unicode alternative for := [41a1b3cd]
• introduce =restart RakuDoc directive [6f557f1e]