Add using literal loading

Signed-off-by: Marcel Müller <neikos@neikos.email>

tests/cases/1-parsed@literals.snap

@@ -0,0 +1,27 @@
+---
+source: tests/file_tests.rs
+expression: parsed
+info:
+  input: "{{ if true }}\n    Hello World!\n{{ end }}"
+  context: {}
+input_file: tests/cases/literals.nomo
+---
+ParsedTemplate {
+    tokens: [
+        [LeftDelim]"{{" (0..2),
+        [Whitespace]" " (2..3),
+        [ConditionalIf]"if" (3..5),
+        [Whitespace]" " (5..6),
+        [Literal(Bool(true))]"true" (6..10),
+        [Whitespace]" " (10..11),
+        [RightDelim]"}}" (11..13),
+        [Whitespace]"\n    " (13..18),
+        [Content]"Hello World!" (18..30),
+        [Whitespace]"\n" (30..31),
+        [LeftDelim]"{{" (31..33),
+        [Whitespace]" " (33..34),
+        [End]"end" (34..37),
+        [Whitespace]" " (37..38),
+        [RightDelim]"}}" (38..40),
+    ],
+}

tests/cases/2-ast@literals.snap

@@ -0,0 +1,44 @@
+---
+source: tests/file_tests.rs
+expression: ast
+info:
+  input: "{{ if true }}\n    Hello World!\n{{ end }}"
+  context: {}
+input_file: tests/cases/literals.nomo
+---
+TemplateAst {
+    root: [
+        ConditionalChain {
+            chain: [
+                Block {
+                    prev_whitespace_content: None,
+                    expression: IfConditional {
+                        expression: Literal {
+                            source: [Literal(Bool(true))]"true" (6..10),
+                            value: Bool {
+                                value: true,
+                            },
+                        },
+                    },
+                    post_whitespace_content: Some(
+                        [Whitespace]"\n    " (13..18),
+                    ),
+                },
+                ConditionalContent {
+                    content: [
+                        StaticContent(
+                            [Content]"Hello World!" (18..30),
+                        ),
+                    ],
+                },
+                Block {
+                    prev_whitespace_content: Some(
+                        [Whitespace]"\n" (30..31),
+                    ),
+                    expression: EndBlock,
+                    post_whitespace_content: None,
+                },
+            ],
+        },
+    ],
+}

tests/cases/3-instructions@literals.snap

@@ -0,0 +1,55 @@
+---
+source: tests/file_tests.rs
+expression: emit
+info:
+  input: "{{ if true }}\n    Hello World!\n{{ end }}"
+  context: {}
+input_file: tests/cases/literals.nomo
+---
+VMInstructions {
+    labels: {
+        LabelSlot {
+            index: 0,
+        }: 7,
+        LabelSlot {
+            index: 2,
+        }: 7,
+    },
+    instructions: [
+        LoadLiteralToSlot {
+            source: [Literal(Bool(true))]"true" (6..10),
+            value: Bool {
+                value: true,
+            },
+            slot: VariableSlot {
+                index: 1,
+            },
+        },
+        JumpIfNotTrue {
+            emit_slot: VariableSlot {
+                index: 1,
+            },
+            jump: LabelSlot {
+                index: 2,
+            },
+        },
+        AppendContent {
+            content: "\n    " (13..18),
+        },
+        AppendContent {
+            content: "Hello World!" (18..30),
+        },
+        AppendContent {
+            content: "\n" (30..31),
+        },
+        Jump {
+            jump: LabelSlot {
+                index: 0,
+            },
+        },
+        AppendContent {
+            content: "\n    " (13..18),
+        },
+        NoOp,
+    ],
+}

tests/cases/4-output@literals.snap

@@ -0,0 +1,9 @@
+---
+source: tests/file_tests.rs
+expression: output
+info:
+  input: "{{ if true }}\n    Hello World!\n{{ end }}"
+  context: {}
+input_file: tests/cases/literals.nomo
+---
+"\n    Hello World!\n"

tests/cases/literals.nomo

@@ -0,0 +1,6 @@
+{
+}
+---
+{{ if true }}
+    Hello World!
+{{ end }}