feat: Begins a generic htmx form context and template, integrates user form, begins views for vendor and purchase orders.

Resources/Views/vendor-form.leaf

@@ -0,0 +1,20 @@
+<form hx-post="/vendors">
+  <input type="hidden"
+         id="vendorId"
+         name="id"
+         #if(vendor.id):
+         value="#(vendor.id)"
+         >
+
+  <input type="text"
+         id="name"
+         name="name"
+         placeholder="Vendor Name"
+         autofocus
+         required
+         #if(vendor.name):
+         value="#(vendor.name)"
+         #endif
+         >
+  <input type="submit" value="#(buttonLabel)">
+</form>