feat: add threadpool and started pooling executors

include/pipeline.h

@@ -0,0 +1,25 @@
+#ifndef SCI_PIPELINE_H
+#define SCI_PIPELINE_H
+#include "optional.h"
+#include <pthread.h>
+#include <sys/inotify.h>
+
+typedef struct {
+    char* name;
+    char* url;
+    char* trigger;
+    char* command;
+} pipeline_conf;
+typedef optional_type(pipeline_conf*) optional_pipeline_conf;
+
+typedef struct {
+    const struct inotify_event* event;
+    const char* command;
+} pipeline_event;
+
+// create a new pipeline_conf struct instance based on a configuration line.
+optional_pipeline_conf pipeline_create(const char* config_line);
+void pipeline_register(pthread_t thread);
+void pipeline_loop();
+
+#endif