Revise README for clarity and detail on mail-parser features and usage

Author: fedelemantuano

.pre-commit-config.yaml

@@ -2,7 +2,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v5.0.0
+  rev: v6.0.0
   hooks:
     - id: trailing-whitespace
     - id: end-of-file-fixer
@@ -20,7 +20,7 @@ repos:
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.7.3
+  rev: v0.14.1
   hooks:
     # Run the linter.
     - id: ruff
@@ -29,7 +29,7 @@ repos:
     - id: ruff-format
 
 - repo: https://github.com/igorshubovych/markdownlint-cli
-  rev: v0.42.0
+  rev: v0.45.0
   hooks:
     - id: markdownlint
       args: ['--fix']