feat: support bang as not alias

[tiye]

Summary

• add RFC 0099 for the strict Bool ! alias
• lex standalone ! as not while preserving !=
• cover runtime type errors, dynamic Not bytecode, syntax docs, and five manuals

Validation

• make check
• targeted bang alias regression test
• make docs
• git diff --check

[Copilot]

Pull request overview

Adds support for using the bang prefix operator (!) as a strict Boolean alias for not in the QuickCoffee language, and updates the language contract + manuals/docs accordingly.

Changes:

• Lex standalone ! as Token::Not while preserving != as strict inequality.
• Add RFC 0099 documenting the ! alias contract.
• Add core tests and update syntax docs + five manuals (and generated HTML) to mention the alias.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/rfc_core.rs	Adds regression coverage for !/!! behavior, runtime error case, and bytecode emission.
src/lexer.rs	Changes ! lexing from a hard error to emitting Token::Not (while keeping !=).
RFCs/0099-bang-not-alias.md	New RFC defining the strict ! alias semantics and acceptance criteria.
RFCs/0000-project-scope.md	Updates project scope RFC index to include RFC 0099.
README.md	Updates RFC range reference to include RFC 0099.
manuals/manual.zh-CN.qc	Mentions ! as strict not alias and clarifies !=.
manuals/manual.latin.qc	Mentions ! as strict not alias and clarifies !=.
manuals/manual.en.qc	Mentions ! as strict not alias and clarifies !=.
manuals/manual.devanagari-sa.qc	Mentions ! as strict not alias and clarifies !=.
manuals/manual.classical-zh.qc	Mentions ! as strict not alias and clarifies !=.
docs/syntax.zh-CN.md	Adds syntax note about ! alias, !=, and non-bool runtime errors.
docs/syntax.en.md	Adds syntax note about ! alias, !=, and non-bool runtime errors.
docs/manual.zh-CN.html	Regenerated manual HTML reflecting the ! alias note.
docs/manual.latin.html	Regenerated manual HTML reflecting the ! alias note.
docs/manual.en.html	Regenerated manual HTML reflecting the ! alias note.
docs/manual.devanagari-sa.html	Regenerated manual HTML reflecting the ! alias note.
docs/manual.classical-zh.html	Regenerated manual HTML reflecting the ! alias note.

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