feat: Added mustache templating.

mustache/examples/hello/hello.mustache

@@ -0,0 +1,11 @@
+Hello, {{name}}!
+
+Languages you know:
+{{#languages}}
+  - {{.}}
+{{/languages}}
+
+{{#show_footer}}
+---
+Rendered with odin-mustache.
+{{/show_footer}}

mustache/examples/hello/hello.odin

@@ -0,0 +1,28 @@
+package main
+
+import "core:fmt"
+import "core:os"
+
+import mustache "../.."
+
+Person :: struct {
+	name:        string,
+	languages:   []string,
+	show_footer: bool,
+}
+
+main :: proc() {
+	data := Person{
+		name      = "World",
+		languages = {"Odin", "C", "Rust"},
+		show_footer = true,
+	}
+
+	result, err := mustache.render_from_filename("hello.mustache", data)
+	if err != nil {
+		fmt.eprintfln("render error: %v", err)
+		os.exit(1)
+	}
+
+	fmt.print(result)
+}