Release v0.46.0 · h3rald/min

Actually removed the invoke symbol and * sigil that were supposed to be removed in v0.44.0 but didn't.
Removed Dockerfile and Notepad++ highlighter (no longer maintained).
When defining or deleting a sigil, a symbol with the same name is now defined/deleted as well.
Removed obsolete aliases io.read and io.write.

Implemented define-sigil (was documented but not actually implemented).
Reviewed documentation making sure that documented operators match with implementation.
The help symbol now correctly displays help for namespaced symbols.
Enhanced the tokenizer symbol to provide additional information for symbols.
Enhanced min shell highlighting to support dot notation, sigils, autopop, global symbols.
Enhanced Vim syntax file to support latest constructs.

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