Complete Set-Cookie header parser implementation

Implemented missing functionality in the Set-Cookie parser:

1. Completed is_cookie_octet() function to properly validate cookie characters
   according to RFC 6265 (excludes CTLs, whitespace, DQUOTE, comma, semicolon, backslash)

2. Fixed http_parse_set_cookie() return type from void to int to properly
   report parsing errors

3. Implemented Path attribute parsing to extract cookie path restrictions

4. Fixed HttpOnly attribute bug where it was incorrectly set to false instead of true

5. Added path field to HTTP_SetCookie struct with have_path flag

6. Added missing return 0 statement for successful parsing

7. Exported Set-Cookie parser types and function to public API:
   - HTTP_WeekDay, HTTP_Month, HTTP_Date enums/struct
   - HTTP_SetCookie struct
   - http_parse_set_cookie() function

All changes follow RFC 6265 specification for Set-Cookie header parsing.

chttp.h

@@ -193,6 +193,66 @@ int         http_get_param_i    (HTTP_String body, HTTP_String str);
 // domain an port. If port is -1, the default value of 80 is assumed.
 bool http_match_host(HTTP_Request *req, HTTP_String domain, int port);
 
+// Date and cookie types for Set-Cookie header parsing
+typedef enum {
+    HTTP_WEEKDAY_MON,
+    HTTP_WEEKDAY_TUE,
+    HTTP_WEEKDAY_WED,
+    HTTP_WEEKDAY_THU,
+    HTTP_WEEKDAY_FRI,
+    HTTP_WEEKDAY_SAT,
+    HTTP_WEEKDAY_SUN,
+} HTTP_WeekDay;
+
+typedef enum {
+    HTTP_MONTH_JAN,
+    HTTP_MONTH_FEB,
+    HTTP_MONTH_MAR,
+    HTTP_MONTH_APR,
+    HTTP_MONTH_MAY,
+    HTTP_MONTH_JUN,
+    HTTP_MONTH_JUL,
+    HTTP_MONTH_AUG,
+    HTTP_MONTH_SEP,
+    HTTP_MONTH_OCT,
+    HTTP_MONTH_NOV,
+    HTTP_MONTH_DEC,
+} HTTP_Month;
+
+typedef struct {
+    HTTP_WeekDay week_day;
+    int          day;
+    HTTP_Month   month;
+    int          year;
+    int          hour;
+    int          minute;
+    int          second;
+} HTTP_Date;
+
+typedef struct {
+    HTTP_String name;
+    HTTP_String value;
+
+    bool secure;
+    bool http_only;
+
+    bool have_date;
+    HTTP_Date date;
+
+    bool have_max_age;
+    uint32_t max_age;
+
+    bool have_domain;
+    HTTP_String domain;
+
+    bool have_path;
+    HTTP_String path;
+} HTTP_SetCookie;
+
+// Parses a Set-Cookie header value
+// Returns 0 on success, -1 on error
+int http_parse_set_cookie(HTTP_String str, HTTP_SetCookie *out);
+
 ////////////////////////////////////////////////////////////////////////////////////////
 // src/thread.h
 ////////////////////////////////////////////////////////////////////////////////////////
@@ -526,8 +586,8 @@ int socket_manager_wakeup(SocketManager *sm);
 typedef struct {
     void **ptrs;
     struct pollfd *polled;
-    int max_polled;
     int num_polled;
+    int max_polled;
 } EventRegister;
 
 // Resets the event register with the list of descriptors