Mkdocs-alias-plugin

Adds the ability to escape aliases so they won't be parsed by the plugin.

Adds the ability to create multiple aliases for a single page (see the documentation for "Multiple Aliases" above). Improves the "alias not found" warning by listing the file attempting to use the alias.

Allow strings as aliases instead of dictionaries, which allows for the use of page titles in the link text of the alias, e.g.:

yaml
---
alias: my-alias
---


This version also makes the `text` key optional in the alias dictionary configuration, using the same page title link text instead if it's not provided.

Fixes linter issues, no major code changes.

Initial release.