Change entity paths to be more human readable

Problem/Motivation

Change entity paths to be more human readable

Legacy (D7) paths as AFAICT
* /translate
Shows a list of languages, the translation status and contributors
* /translate/projects
Shows a glossary like view of projects

* /translate/projects/{project_name}
Shows a list of languages and translation status
* /translate/projects/{project_name}/releases
Show a list of releases and stats
* /translate/projects/{project_name}/export
Show a form to export gettext templates

Current (D9) paths are:
* /l10n_server_project/{id}
* /l10n_server_release/{id}

Steps to reproduce

Proposed resolution

/translations
/projects
/project/{id}
/project/{id}/releases
/release/{id} or /project/{id}/release/{id}
...

And use pathauto and/or redirect module to provide legacy URLs.

Remaining tasks

User interface changes

API changes

Data model changes