Due to `utils` module removal, `EXTERNAL_CONFIG_FLAGS` was not working, so the system was redesigned.
This change is independent of #4411

[utils] was created long time ago, when [rcore] contained all the platforms code, the purpose of the file was exposing basic filesystem functionality across modules and also logging mechanism but many things have changed since then and there is no need to keep using this module.

 - Logging system has been move to [rcore] module and macros are exposed through `config.h` to other modules
 - File system functionality has also been centralized in [rcore] module that along the years it was already adding more and more file-system functions, now they are all in the same module
 - Android specific code has been moved to `rcore_android.c`, it had no sense to have specific platform code in `utils`, [rcore] is responsible of all platform code.

Note that issue has been reported by CodeQL static analysis system

Following raylib design, a warning log message is shown and program can continue execution.
Some early return checks have been added on most  critical functions.
[rtext] Previous implementation checking `isGpuReady` cross-module variable is not needed any more, resulting in a more decoupled code, load failure is managed at rlgl level

- REVIEWED: Checking `NULL` input on functions getting `const char *text`, to avoid crashes
- REVIEWED: `strcpy()` usage, prioritize `strncpy()` with limited copy to buffer size
- REPLACED: `strlen()` by `TextLength()` on [rtext] module
- REVIEWED: Replaced some early returns (but keeping others, for easier code following)

Specifically "occured" -> "occurred"

* Get C++ compilers working

* Fix Formatting

// File management functions
 - int FileRename(const char *fileName, const char *fileRename); // Rename file (if exists)
 - iint FileRemove(const char *fileName);                         // Remove file (if exists)
 - iint FileCopy(const char *srcPath, const char *dstPath);       // Copy file from one path to another, dstPath created if it doesn't exist
 - iint FileMove(const char *srcPath, const char *dstPath);       // Move file from one directory to another, dstPath created if it doesn't exist
 - int FileTextReplace(const char *fileName, const char *search, const char *replacement); // Replace text in an existing file
 - iint FileTextFindIndex(const char *fileName, const char *search); // Find text in existing file

// Text management functions
 - const char *TextRemoveSpaces(const char *text);                                       // Remove text spaces, concat words
 - char *GetTextBetween(const char *text, const char *begin, const char *end);           // Get text between two strings
 - char *TextReplace(const char *text, const char *search, const char *replacement);     // Replace text string (WARNING: memory must be freed!)
 - char *TextReplaceBetween(const char *text, const char *begin, const char *end, const char *replacement); // Replace text between two specific strings (WARNING: memory must be freed!)

This reverts commit 4e8d08523f.

* add const qualifier to the first arg of TextJoin

* Update raylib_api.* by CI

* Update raylib.h

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Ray <raysan5@gmail.com>

This redesign is a big improvement on font loading time and memory requirements. It only loads glyphs available on font from requested codepoints and only processes those glyphs for packaging. When processing +10K codepoints (CJK), the loading time improves considerably.