Pharo 14 lands with a rebuilt toolchain and RISC-V JIT support

Pharo 14 ships after 978 merged pull requests and 616 closed issues, focused on three fronts: modernizing development tools with Mission Control and Pulse replacing Spotter, a rewritten Settings Browser, and Epicea and ProfStef folded into NewTools; rebuilding the refactoring and command infrastructure; and modernizing the VM with unified frames, RISC-V JIT support, and direct old-space allocation. The release also moves Pharo's schedule from spring to fall.