updated folder structure

include/line_reader.h

@@ -0,0 +1,59 @@
+/**
+ * line_reader.h
+ * Functions for reading and parsing command lines
+ */
+
+#ifndef LINE_READER_H
+#define LINE_READER_H
+
+#include "common.h"
+
+/**
+ * Check if a command is valid
+ *
+ * @param cmd The command to check
+ * @return 1 if valid, 0 if not
+ */
+int is_valid_command(const char *cmd);
+
+/**
+ * Read a key from the terminal
+ * 
+ * Handles special keys and escape sequences
+ */
+int read_key(void);
+
+/**
+ * Read a line of input from the user with tab completion
+ *
+ * @return The line read from stdin (must be freed by caller)
+ */
+char *lsh_read_line(void);
+
+void generate_enhanced_prompt(char *prompt_buffer, size_t buffer_size);
+
+/**
+ * Split a line into tokens
+ *
+ * @param line The line to split
+ * @return An array of tokens (must be freed by caller)
+ */
+char **lsh_split_line(char *line);
+
+/**
+ * Parse a token from a string, handling quoted strings
+ *
+ * @param str_ptr Pointer to the string to parse, will be updated
+ * @return The parsed token, or NULL if no more tokens
+ */
+char *parse_token(char **str_ptr);
+
+/**
+ * Split a line with pipes into separate command arrays
+ *
+ * @param line The line to split
+ * @return NULL-terminated array of NULL-terminated token arrays
+ */
+char ***lsh_split_piped_line(char *line);
+
+#endif // LINE_READER_H