Phase 1 bootstrap: Blaise compiler skeleton
Renames the project from 'Clean Pascal' to Blaise (after Blaise Pascal).
Adds the Phase 1 compiler pipeline with TDD test suite:
- uPasTokeniser: general Pascal tokeniser (ported from fpGUI IDE)
- uLexer: compiler-specific adapter — filters whitespace/comments,
maps to TTokenKind, unescapes string literals
- uAST: typed AST node hierarchy (TProgram, TBlock, TBinaryExpr, etc.)
- uParser: recursive-descent parser for the Phase 1 BNF grammar
- uCodeGenQBE: QBE IR emitter — WriteLn/Write built-ins, integer
variables, arithmetic, string literals
- Blaise.pas: compiler driver — parses flags, shells to qbe+cc
- FPCUnit test suites for lexer, parser, and code generator
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