Add deep access

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

tests/cases/deep_access.1-parsed.snap

@@ -0,0 +1,74 @@
+---
+source: tests/file_tests.rs
+expression: parsed
+info:
+  input: "{{ if world?.active }}\nHello {{= world.name }}\n{{ end }}\n\n{{ if world?.foo?.bar?.active }}\n    Weird!\n{{ else }}\n    Deep access is working :)\n{{ end }}"
+  context:
+    world:
+      active: true
+      name: World!
+---
+ParsedTemplate {
+    tokens: [
+        [LeftDelim]"{{" (0..2),
+        [Whitespace]" " (2..3),
+        [ConditionalIf]"if" (3..5),
+        [Whitespace]" " (5..6),
+        [Ident]"world" (6..11),
+        [Operator(QuestionMark)]"?" (11..12),
+        [Operator(Dot)]"." (12..13),
+        [Ident]"active" (13..19),
+        [Whitespace]" " (19..20),
+        [RightDelim]"}}" (20..22),
+        [Whitespace]"\n" (22..23),
+        [Content]"Hello" (23..28),
+        [Whitespace]" " (28..29),
+        [LeftDelim]"{{" (29..31),
+        [WantsOutput]"=" (31..32),
+        [Whitespace]" " (32..33),
+        [Ident]"world" (33..38),
+        [Operator(Dot)]"." (38..39),
+        [Ident]"name" (39..43),
+        [Whitespace]" " (43..44),
+        [RightDelim]"}}" (44..46),
+        [Whitespace]"\n" (46..47),
+        [LeftDelim]"{{" (47..49),
+        [Whitespace]" " (49..50),
+        [End]"end" (50..53),
+        [Whitespace]" " (53..54),
+        [RightDelim]"}}" (54..56),
+        [Whitespace]"\n\n" (56..58),
+        [LeftDelim]"{{" (58..60),
+        [Whitespace]" " (60..61),
+        [ConditionalIf]"if" (61..63),
+        [Whitespace]" " (63..64),
+        [Ident]"world" (64..69),
+        [Operator(QuestionMark)]"?" (69..70),
+        [Operator(Dot)]"." (70..71),
+        [Ident]"foo" (71..74),
+        [Operator(QuestionMark)]"?" (74..75),
+        [Operator(Dot)]"." (75..76),
+        [Ident]"bar" (76..79),
+        [Operator(QuestionMark)]"?" (79..80),
+        [Operator(Dot)]"." (80..81),
+        [Ident]"active" (81..87),
+        [Whitespace]" " (87..88),
+        [RightDelim]"}}" (88..90),
+        [Whitespace]"\n    " (90..95),
+        [Content]"Weird!" (95..101),
+        [Whitespace]"\n" (101..102),
+        [LeftDelim]"{{" (102..104),
+        [Whitespace]" " (104..105),
+        [ConditionalElse]"else" (105..109),
+        [Whitespace]" " (109..110),
+        [RightDelim]"}}" (110..112),
+        [Whitespace]"\n    " (112..117),
+        [Content]"Deep access is working :)" (117..142),
+        [Whitespace]"\n" (142..143),
+        [LeftDelim]"{{" (143..145),
+        [Whitespace]" " (145..146),
+        [End]"end" (146..149),
+        [Whitespace]" " (149..150),
+        [RightDelim]"}}" (150..152),
+    ],
+}