feat: greatly improve capturing all formats of inline metadata (#41)

feat: greatly improve capturing metadata all formats of inline metadata

tests/fixtures/test_vault/sample_note.md

@@ -0,0 +1,42 @@
+---
+date_created: 2022-12-22 # confirm dates are translated to strings
+tags:
+    - foo
+    - bar
+frontmatter1: foo
+frontmatter2: ["bar", "baz", "qux"]
+🌱: 🌿
+# Nested lists are not supported
+# invalid:
+#     invalid:
+#         - invalid
+#         - invalid2
+---
+
+# Heading 1
+
+inline1:: foo
+inline1::bar baz
+**inline2**:: [[foo]]
+_inline3_:: value
+🌱::🌿
+key with space:: foo
+
+> inline4:: foo
+
+inline5::
+
+foo bar [intext1:: foo] baz `#invalid` qux (intext2:: foo) foobar. #tag1 Foo bar #tag2 baz qux. [[link]]
+
+The quick brown fox jumped over the lazy dog.
+
+# tag3
+
+---
+
+## invalid: invalid
+
+```python
+invalid:: invalid
+#invalid
+```