Remove TactilityC and Firmware subprojects (#638)

- Removed TactilityC, moved its symbols to existing modules and several new ones (pthread-module, c-symbols-module, cpp-symbols-module, posix-symbols-module, freertos-module).
- Removed Firmware subproject and moved main() into Tactility subproject.
- Strengthened application archive, path, version, stack-size, and device validation.
- Moved symbol resolution for elf_loader to app-esp32-module.
- Improved `struct Module` declarations and made module and symbol definitions in modules more consistent.
- Removed old http download code from Tactility subproject.
- Rename app-module's source files for consistency.
- Add missing pthread symbols.
- Kernel module symbols are now resolvable on all platforms.

Modules/posix-symbols-module/source/module.cpp

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: Apache-2.0
+#include <posix_symbols/module.h>
+
+#include <csetjmp>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <dirent.h>
+#include <fcntl.h>
+#include <strings.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#if __has_include(<getopt.h>)
+#include <getopt.h>
+#define POSIX_SYMBOLS_HAS_GETOPT_LONG 1
+#endif
+
+extern "C" {
+
+static const ModuleSymbol SYMBOLS[] = {
+    // unistd.h
+    DEFINE_MODULE_SYMBOL(usleep),
+    DEFINE_MODULE_SYMBOL(sleep),
+    DEFINE_MODULE_SYMBOL(exit),
+    DEFINE_MODULE_SYMBOL(close),
+    DEFINE_MODULE_SYMBOL(rmdir),
+    DEFINE_MODULE_SYMBOL(unlink),
+    DEFINE_MODULE_SYMBOL(open),
+    DEFINE_MODULE_SYMBOL(access),
+    DEFINE_MODULE_SYMBOL(isatty),
+    DEFINE_MODULE_SYMBOL(read),
+    DEFINE_MODULE_SYMBOL(write),
+    DEFINE_MODULE_SYMBOL(lseek),
+    // strings.h
+#if defined(__BSD_VISIBLE) && __BSD_VISIBLE
+    DEFINE_MODULE_SYMBOL(explicit_bzero),
+#endif
+    DEFINE_MODULE_SYMBOL(strcasecmp),
+    DEFINE_MODULE_SYMBOL(strncasecmp),
+    // string.h
+    DEFINE_MODULE_SYMBOL(strdup),
+    DEFINE_MODULE_SYMBOL(stpcpy),
+    // time.h
+    DEFINE_MODULE_SYMBOL(clock_gettime),
+    DEFINE_MODULE_SYMBOL(localtime_r),
+    // setjmp.h
+    DEFINE_MODULE_SYMBOL(longjmp),
+    DEFINE_MODULE_SYMBOL(setjmp),
+    // dirent.h
+    DEFINE_MODULE_SYMBOL(opendir),
+    DEFINE_MODULE_SYMBOL(closedir),
+    DEFINE_MODULE_SYMBOL(readdir),
+    // fcntl.h
+    DEFINE_MODULE_SYMBOL(fcntl),
+    // sys/stat.h
+    DEFINE_MODULE_SYMBOL(stat),
+    DEFINE_MODULE_SYMBOL(mkdir),
+    // stdlib.h
+    DEFINE_MODULE_SYMBOL(rand_r),
+    DEFINE_MODULE_SYMBOL(setenv),
+    DEFINE_MODULE_SYMBOL(unsetenv),
+    // stdio.h - lets an app find the descriptor behind a stream. Needed when stdin/stdout have
+    // been pointed somewhere other than descriptors 0 and 1, e.g. an app that owns a terminal.
+    DEFINE_MODULE_SYMBOL(fileno),
+    // getopt.h - optind/opterr/optarg/optopt are POSIX; getopt_long is a GNU/BSD extension, only
+    // exported when <getopt.h> is actually available.
+    DEFINE_MODULE_SYMBOL(optind),
+    DEFINE_MODULE_SYMBOL(opterr),
+    DEFINE_MODULE_SYMBOL(optarg),
+    DEFINE_MODULE_SYMBOL(optopt),
+#ifdef POSIX_SYMBOLS_HAS_GETOPT_LONG
+    DEFINE_MODULE_SYMBOL(getopt_long),
+#endif
+    MODULE_SYMBOL_TERMINATOR,
+};
+
+Module posix_symbols_module = {
+    .name = "posix-symbols",
+    .start = nullptr,
+    .stop = nullptr,
+    .drivers = nullptr,
+    .symbols = SYMBOLS,
+    .internal = nullptr,
+};
+
+}