Standardize naming conventions (#12)

## Summary

Standardize naming conventions across the entire wizapp-stdlib codebase by replacing inconsistent prefixes and snake_case with a unified `wp` prefix + CamelCase scheme.

## Changes

### Naming convention applied

| Pattern | Before | After |
|---|---|---|
| Public functions | `wapp_module_function` | `wpModuleFunction` |
| Public types | `GenericXxx`, bare `Xxx` | `WpXxx` |
| Constants / enum values | `WAPP_XXX`, `SHELL_XXX` | `WP_XXX`, `WP_SHELL_XXX` |
| Internal functions | `_module_function` | `_moduleFunction` |
| Storage-class macros | `wapp_extern`, `wapp_intern` | `wp_extern`, `wp_intern` |

### Modules affected

All 20 modules were renamed: `arena`, `array`, `dbl_list`, `queue`, `str8`, `mem_allocator`, `mem_utils`, `mem_os`, `file`, `cpath`, `log`, `shell_commander`, `shell_termcolour`, `shell_utils`, `prng/xorshift`, `uuid`, `tester`, `aliases`, `assert`, `misc_utils`, `platform` — plus their test files.

### Backward compatibility

Added `src/oldnames.h` with `#define OLD_NAME NEW_NAME` for every renamed symbol, organized by module under Constants → Types → Functions sections. Existing code that includes this file will compile without changes.

Reviewed-on: #12
Co-authored-by: Abdelrahman <said.abdelrahman89@gmail.com>
Co-committed-by: Abdelrahman <said.abdelrahman89@gmail.com>

src/log/log.h

@@ -7,28 +7,28 @@
 #include "../base/strings/str8/str8.h"
 
 typedef enum {
-	WAPP_LOG_FATAL,
-	WAPP_LOG_CRITICAL,
-	WAPP_LOG_ERROR,
-	WAPP_LOG_WARNING,
-	WAPP_LOG_INFO,
-	WAPP_LOG_DEBUG,
+	WP_LOG_LEVEL_FATAL,
+	WP_LOG_LEVEL_CRITICAL,
+	WP_LOG_LEVEL_ERROR,
+	WP_LOG_LEVEL_WARNING,
+	WP_LOG_LEVEL_INFO,
+	WP_LOG_LEVEL_DEBUG,
 
 	COUNT_LOG_LEVEL,
-} LogLevel;
+} WpLogLevel;
 
 typedef struct {
-	Str8 name;
-} Logger;
+	WpStr8 name;
+} WpLogger;
 
-void wapp_log_set_level(LogLevel level);
-void wapp_log_configure(WFile *outlog, WFile *errlog, LogLevel level);
-Logger wapp_log_make_logger(Str8 name);
-void wapp_log_debug(const Logger *logger, Str8 msg);
-void wapp_log_info(const Logger *logger, Str8 msg);
-void wapp_log_warning(const Logger *logger, Str8 msg);
-void wapp_log_error(const Logger *logger, Str8 msg);
-void wapp_log_critical(const Logger *logger, Str8 msg);
-void wapp_log_fatal(const Logger *logger, Str8 msg);
+void wpLogSetLevel(WpLogLevel level);
+void wpLogConfigure(WpFile *outlog, WpFile *errlog, WpLogLevel level);
+WpLogger wpLogMakeLogger(WpStr8 name);
+void wpLogDebug(const WpLogger *logger, WpStr8 msg);
+void wpLogInfo(const WpLogger *logger, WpStr8 msg);
+void wpLogWarning(const WpLogger *logger, WpStr8 msg);
+void wpLogError(const WpLogger *logger, WpStr8 msg);
+void wpLogCritical(const WpLogger *logger, WpStr8 msg);
+void wpLogFatal(const WpLogger *logger, WpStr8 msg);
 
 #endif // !LOG_H