[FL-3965] Separate cli_shell into toolbox (#4175)

* cli_shell: separate into toolbox

* fix: cmd flags

* fix formatting

* cli: increase default stack depth

* cli_shell: fix loader lock logic

* cli: fix command flags

* fix f18

* speaker_debug: fix

* cli_registry: fix docs

* ufbt: rename cli target back

* cli: rename app and record

* cli: fix and simplify help command

* cli_master_shell: fix ext commands

* fix formatting

* cli: rename master to main

* fix formatting

---------

Co-authored-by: hedger <hedger@users.noreply.github.com>

lib/toolbox/cli/shell/cli_shell.h

@@ -0,0 +1,75 @@
+#pragma once
+
+#include <furi.h>
+#include <toolbox/pipe.h>
+#include "../cli_registry.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CLI_SHELL_STACK_SIZE (4 * 1024U)
+
+typedef struct CliShell CliShell;
+
+/**
+ * Called from the shell thread to print the Message of the Day when the shell
+ * is started.
+ */
+typedef void (*CliShellMotd)(void* context);
+
+/**
+ * @brief Allocates a shell
+ * 
+ * @param [in] motd       Message of the Day callback
+ * @param [in] context    Callback context
+ * @param [in] pipe       Pipe side to be used by the shell
+ * @param [in] registry   Command registry
+ * @param [in] ext_config External command configuration. See
+ *                        `CliCommandExternalConfig`. May be NULL if support for
+ *                        external commands is not required.
+ * 
+ * @return Shell instance
+ */
+CliShell* cli_shell_alloc(
+    CliShellMotd motd,
+    void* context,
+    PipeSide* pipe,
+    CliRegistry* registry,
+    const CliCommandExternalConfig* ext_config);
+
+/**
+ * @brief Frees a shell
+ * 
+ * @param [in] shell Shell instance
+ */
+void cli_shell_free(CliShell* shell);
+
+/**
+ * @brief Starts a shell
+ * 
+ * The shell runs in a separate thread. This call is non-blocking.
+ * 
+ * @param [in] shell Shell instance
+ */
+void cli_shell_start(CliShell* shell);
+
+/**
+ * @brief Joins the shell thread
+ * 
+ * @warning This call is blocking.
+ * 
+ * @param [in] shell Shell instance
+ */
+void cli_shell_join(CliShell* shell);
+
+/**
+ * @brief Sets optional text before prompt (`>:`)
+ * 
+ * @param [in] shell Shell instance
+ */
+void cli_shell_set_prompt(CliShell* shell, const char* prompt);
+
+#ifdef __cplusplus
+}
+#endif