feat: Symmetric Multiprocessing, text editor improvements, merge doom libc, implement math functions

programs/include/libc/math.h

@@ -17,13 +17,24 @@ double ceil(double x);
 double sqrt(double x);
 double sin(double x);
 double cos(double x);
+double tan(double x);
+double atan(double x);
 double atan2(double y, double x);
 double pow(double base, double exp);
 double log(double x);
+double log2(double x);
+double log10(double x);
 double exp(double x);
 double fmod(double x, double y);
 double round(double x);
 
+float  floorf(float x);
+float  ceilf(float x);
+float  fabsf(float x);
+float  sqrtf(float x);
+float  sinf(float x);
+float  cosf(float x);
+
 #ifdef __cplusplus
 }
 #endif

programs/include/libc/unistd.h

@@ -14,6 +14,8 @@ int    write(int fd, const void *buf, size_t count);
 int    close(int fd);
 long   lseek(int fd, long offset, int whence);
 
+unsigned int sleep(unsigned int seconds);
+
 #ifdef __cplusplus
 }
 #endif