Add markdownlint to pre-commit (openvinotoolkit#1996)

### Changes

Add [markdownlint](https://github.com/DavidAnson/markdownlint) check to
pre-commit

Fixed: 

- Incorrect links
- Ordered lists
- Blank lines before and after headers and code blocks
- Types for code blocks
- Trailing spaces
- Spellcheck
- Removed module-timm_custom_modules from api doc

Author: AlexanderDokuchaev

.markdownlint.yaml

@@ -0,0 +1,9 @@
+# Default state for all rules
+default: true
+
+MD013: false  # Line length
+MD033: false  # Inline HTML
+MD034: false  # Bare URL used
+MD036: false  # Emphasis used instead of a heading
+MD037: false  # Spaces inside emphasis markers
+MD041: false  # First line

.pre-commit-config.yaml

@@ -14,3 +14,9 @@ repos:
     hooks:
       - id: isort
         name: isort (python)
+
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.33.0
+    hooks:
+      - id: markdownlint
+        args: [--config=.markdownlint.yaml]