v0.2k: Streams

Features:

• union and unique have string overloads. The order is now preserved.
• isnil.
• streams (xz bzip2 gzip lz4 input/output, CRC32 CRC32C XXH32 MD5 MD2 Adler32 Sha1 digest streams, histogram streams, null streams, tee streams, byte buffer input/output, file input/output, audio streams, custom streams via wrapper).
• sockets now use streams.
• prime:factors - error when n<2.
• support sh:process to launch external processes, manage their state, capture their input and output.
• terminal/editor font reset (fixes a rare highlight bug).
• terminal repl: fix quote/escape parsing.
• fix the name of cdar
• IDE: project support, syncing projects to different terminal sessions
• fix matrix:trace, rename to num:trace.
• cas:matrix:trace works on symbolic functions (@der-teufel-programming)
• fix a bug in num:LU that threw division by zero error on singular matrices. properly detect singular matrices now.
• fix builds on Java 19 (bump PG)
• import can load project files now.
• fix rank when reactive forms are present in an array.
• MathExpression composition
• PLU decomposition, determinants, matrix inversion for flt64: and num: