Allow specifying rotation patterns for Sparse and Solid infill (#9924)

* SPE-2405: Add Zig Zag infill that is rectilinear infill but with a consistent pattern between layers.

This Zig Zag infill is inspired by the Zig Zag infill in Cura.

Change-Id: I798affa99f4b5c3bd67f47643e67530fb7c3e0cb
(cherry picked from commit 2808d04d5deef6f99f9618648e46f11de03efc98)

* Add Cross zag and locked-zag for shoes

Ported from BambuStudio

* wip

* sparse infill roratation template

* solid_infill_rotate_template

* remove rotate_solid_infill_direction

* hide sparse infill rotation template for non applicable infill pattern

* hide solid_infill_rotate_template for non supported solid infill patterns

* update icon

* support empty string for ConfigOptionFloats deserialize

* fix build errors

---------

Co-authored-by: Lukáš Hejl <hejl.lukas@gmail.com>

src/libslic3r/Config.hpp

@@ -657,6 +657,11 @@ public:
     {
         if (! append)
             this->values.clear();
+
+        if (str.empty()) {
+            this->values.push_back(0);
+            return true;
+        }
         std::istringstream is(str);
         std::string item_str;
         while (std::getline(is, item_str, ',')) {
@@ -675,6 +680,13 @@ public:
         }
         return true;
     }
+    static bool validate_string(const std::string &str)
+    {
+        // should only have number and commas
+        return std::all_of(str.begin(), str.end(), [](char c) {
+            return std::isdigit(c) || c == ','|| std::isspace(c);
+        });
+    }
 
     ConfigOptionFloatsTempl& operator=(const ConfigOption *opt)
     {