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* SubGhz: add worker subghz_txrx * SubGhz: added support for transferring Russian characters and support for backspace in CLI subghz_txrx * SubGhz: refactoring subghz_txrx_worker, added a callback for accepting data in an empty one RX buffer * SubGhz: fix conflict * SubGhz: fix syntax errors * Cli: document string_move usage and its behavior * FuriHal: update subghz api and documentation. Subghz: move chat to subghz cli subcommand. * Subghz: update text in chat cli Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>