feat: readme and doxyfile

Doxyfile

@@ -1,5 +1,58 @@
+# Project identity
+PROJECT_NAME           = "tstd"
+PROJECT_NUMBER         = 0.1.0
+PROJECT_BRIEF          = "Tiny STD-like utilities in C"
 OUTPUT_DIRECTORY       = docs
-GENERATE_HTML = YES
-GENERATE_LATEX = NO
-INPUT *.c *.h
+
+# Input
+INPUT                  = src include README.md
+FILE_PATTERNS          = *.c *.h *.md
+RECURSIVE              = YES
+EXCLUDE                = build docs
+EXCLUDE_PATTERNS       = */.git/* */.cache/*
+
+# Main page
 USE_MDFILE_AS_MAINPAGE = README.md
+MARKDOWN_SUPPORT       = YES
+EXTENSION_MAPPING      = md=markdown
+
+# HTML
+GENERATE_HTML          = YES
+HTML_OUTPUT            = html
+GENERATE_TREEVIEW      = YES
+HTML_DYNAMIC_SECTIONS  = YES
+SEARCHENGINE           = YES
+
+# LaTeX/PDF
+GENERATE_LATEX         = NO
+
+# Source browsing
+SOURCE_BROWSER         = YES
+INLINE_SOURCES         = YES
+STRIP_CODE_COMMENTS    = NO
+
+# Extraction and docs quality
+EXTRACT_ALL            = YES
+EXTRACT_PRIVATE        = NO
+EXTRACT_STATIC         = YES
+EXTRACT_LOCAL_CLASSES  = YES
+HAVE_DOT               = YES
+CALL_GRAPH             = YES
+CALLER_GRAPH           = YES
+DOT_IMAGE_FORMAT       = svg
+INTERACTIVE_SVG        = YES
+DOT_TRANSPARENT        = YES
+
+# Warnings and tidy
+WARNINGS               = YES
+WARN_IF_UNDOCUMENTED   = YES
+WARN_IF_DOC_ERROR      = YES
+WARN_NO_PARAMDOC       = YES
+WARN_AS_ERROR          = NO
+QUIET                  = NO
+
+# Preprocessor
+ENABLE_PREPROCESSING   = YES
+MACRO_EXPANSION        = YES
+EXPAND_ONLY_PREDEF     = NO
+INCLUDE_PATH           = include

README.md

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+# TSTD
+
+A C library providing various string manipulation utilities.
+
+## Usage
+
+To use TSTD in your CMake project, you can either build it from source or include it using FetchContent.
+
+### Integration with FetchContent
+
+Add the following to your CMakeLists.txt:
+
+```cmake
+cmake_minimum_required(VERSION 3.20)
+
+project(myproj C)
+
+set(CMAKE_C_STANDARD 23)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+include(FetchContent)
+
+FetchContent_Declare(
+        tstd
+        GIT_REPOSITORY https://github.com/Tilo-K/tstd.git
+        GIT_TAG main
+)
+
+FetchContent_MakeAvailable(tstd)
+
+add_executable(myapp src/main.c)
+
+target_link_libraries(myapp PRIVATE tstd)
+```