proof-of-concept is working

- Introduced `set_multipart_form.vi` for handling multipart form data.
- Updated `set_output_file.vi` to enhance file output capabilities.
- Modified `test_full_flow.vi` to improve testing coverage.
- Updated `http_method_enum.ctl` for better HTTP method handling.
- Added `support.path_to_string.vi` to facilitate path conversions.
- Included new examples in the project structure for better usage demonstration.
- Updated project files to reflect new dependencies and library structure.
- Enhanced support functions for reading and freeing C strings in memory.

Author: jimkring

docs/pull_requests/multipart-uploads/labview_multipart_vis_specification.md

@@ -8,7 +8,7 @@ This document specifies the LabVIEW VIs required to wrap the new multipart/form-
 ### Location
 Create a new LabVIEW class at: `lv_src/MultipartForm/MultipartForm.lvclass`
 
-### Core VIs Required
+### Core VIs Required ✅
 
 #### 1. `create.vi` ✅
 **Purpose**: Create a new multipart form instance  
@@ -43,7 +43,7 @@ Create a new LabVIEW class at: `lv_src/MultipartForm/MultipartForm.lvclass`
 
 ---
 
-#### 3. `add_text_field.vi`
+#### 3. `add_text_field.vi` ✅
 **Purpose**: Add a text field to the multipart form  
 **Inputs**:
 - `multipart form in` (MultipartForm.lvclass)
@@ -63,7 +63,7 @@ Create a new LabVIEW class at: `lv_src/MultipartForm/MultipartForm.lvclass`
 
 ---
 
-#### 4. `add_file.vi`
+#### 4. `add_file.vi` ✅
 **Purpose**: Add a file from disk to the multipart form  
 **Inputs**:
 - `multipart form in` (MultipartForm.lvclass)
@@ -83,7 +83,7 @@ Create a new LabVIEW class at: `lv_src/MultipartForm/MultipartForm.lvclass`
 
 ---
 
-#### 5. `add_binary_data.vi`
+#### 5. `add_binary_data.vi` ✅
 **Purpose**: Add binary data as a file part  
 **Inputs**:
 - `multipart form in` (MultipartForm.lvclass)
@@ -120,7 +120,7 @@ Create a new LabVIEW class at: `lv_src/MultipartForm/MultipartForm.lvclass`
 
 ---
 
-#### 7. `read_error_message.vi`
+#### 7. `read_error_message.vi` ✅
 **Purpose**: Get the last error message from the multipart form  
 **Inputs**:
 - `multipart form in` (MultipartForm.lvclass)
@@ -139,14 +139,14 @@ Create a new LabVIEW class at: `lv_src/MultipartForm/MultipartForm.lvclass`
 
 ---
 
-## RequestBuilder Class Extension
+## RequestBuilder Class Extension ✅
 
 ### Location
 Modify existing class at: `lv_src/RequestBuilder/RequestBuilder.lvclass`
 
 ### New VI Required
 
-#### `set_multipart_form.vi`
+#### `set_multipart_form.vi` ✅
 **Purpose**: Attach a multipart form to the request  
 **Inputs**:
 - `request builder in` (RequestBuilder.lvclass)
@@ -166,14 +166,14 @@ Modify existing class at: `lv_src/RequestBuilder/RequestBuilder.lvclass`
 
 ---
 
-## Library Updates
+## Library Updates ✅
 
-### reqwest.lvlib
+### reqwest.lvlib ✅
 Add the following VIs to the library:
 - All MultipartForm class VIs
 - The new RequestBuilder VI
 
-### reqwest.aliases
+### reqwest.aliases ✅
 Add Call Library Function Node configurations for:
 - `multipart_form_create`
 - `multipart_form_destroy`
@@ -192,14 +192,14 @@ Add Call Library Function Node configurations for:
 
 ### Recommended Examples
 
-#### 1. `Example - Multipart Text Fields.vi`
+#### 1. `Example - Multipart Text Fields.vi` ✅
 Demonstrates:
 - Creating a multipart form
 - Adding multiple text fields
 - Sending the request
 - Cleaning up resources
 
-#### 2. `Example - File Upload.vi`
+#### 2. `Example - File Upload.vi` ✅
 Demonstrates:
 - Creating a multipart form
 - Adding a file from disk