[Feat] Alias manager

[Himalian]

Use mkdocs-note alias to manage alias, inspired by scoop alias.

Example usage:

# create new alias
mkdocs-note alias add ls "mkdocs-note list"
mkdocs-note alias add vld "mkdocs-note validate --path docs"
# run command alias
mkdocs-note ls
# list all aliases
mkdocs-note alias list
# remove alias
mkdocs-note alias remove ls

Available subcommands:

• add: create new alias
• remove: remove alias
• list: print all aliases