USB VCP Cli (#237)

* Core: ring buffer.
* Api: usb vcp. F3: vcp glue code.
* Applications: cli draft version.
* Cli: basic working version, includes help and version commands
* HAL: vcp on f2
* Makefile: update openocd conf
* F3: vcp rx with freertos stream
* Cli: help
* Cli: standard commands, api-hal-uid
* Power: cli poweroff.

applications/cli/cli_i.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "cli.h"
+
+#include <flipper.h>
+#include <flipper_v2.h>
+
+#include <m-dict.h>
+
+#define CLI_LINE_SIZE_MAX
+
+typedef struct {
+    CliCallback callback;
+    void* context;
+} CliCommand;
+
+DICT_DEF2(CliCommandDict, string_t, STRING_OPLIST, CliCommand, M_POD_OPLIST)
+
+typedef enum {
+    CliSymbolAsciiSOH = 0x01,
+    CliSymbolAsciiEOT = 0x04,
+    CliSymbolAsciiBell = 0x07,
+    CliSymbolAsciiBackspace = 0x08,
+    CliSymbolAsciiTab = 0x09,
+    CliSymbolAsciiCR = 0x0D,
+    CliSymbolAsciiEsc = 0x1B,
+    CliSymbolAsciiUS = 0x1F,
+    CliSymbolAsciiSpace = 0x20,
+    CliSymbolAsciiDel = 0x7F,
+} CliSymbols;
+
+struct Cli {
+    CliCommandDict_t commands;
+    osMutexId_t mutex;
+    string_t line;
+};
+
+Cli* cli_alloc();
+void cli_free(Cli* cli);
+void cli_reset_state(Cli* cli);
+void cli_print_version();
+void cli_putc(char c);