VCS: Add mercurial "version control metadata"

[dettus]

Hello!

So, I just started working with Godot (again...)
I like the feature that your editor seems to integrate a Version Control System into the project.
However, it looks as if the default configuration only features Git?

The thing is, that I am a huge fan of mercurial nowadays, and I would thus like to propose adding it as a feature.

The usage is not that different from GIT:
https://www.mercurial-scm.org/quickstart

instead of "git clone", you do "hg clone".
instead of "git commit -a", you do "hg commit"
instead of "git push", you do "hg push"
instead of "git pull", you do "hg pull ; hg update"
instead of "git add", you do "hg add"
instead of "git rm", you do "hg rm"

; hg 
Mercurial Distributed SCM

basic commands:

 add           add the specified files on the next commit
 annotate      show changeset information by line for each file
 clone         make a copy of an existing repository
 commit        commit the specified files or all outstanding changes
 diff          diff repository (or selected files)
 export        dump the header and diffs for one or more changesets
 forget        forget the specified files on the next commit
 init          create a new repository in the given directory
 log           show revision history of entire repository or files
 merge         merge another revision into working directory
 pull          pull changes from the specified source
 push          push changes to the specified destination
 remove        remove the specified files on the next commit
 serve         start stand-alone webserver
 status        show changed files in the working directory
 summary       summarize working directory state
 update        update working directory (or switch revisions)

(use 'hg help' for the full list of commands or 'hg -v' for details)

Having this feature would offer a lot of freedom to developers such as myself.

[Calinou]

Feel free to open a pull request that lets the editor generate an .hgignore file 🙂

You'll need to modify these parts of the source code:

https://github.com/godotengine/godot/blob/eee39f004b42a4948af90cdebedf65c34a4a4970/editor/project_manager/project_dialog.cpp#L1057

https://github.com/godotengine/godot/blob/eee39f004b42a4948af90cdebedf65c34a4a4970/editor/plugins/version_control_editor_plugin.cpp#L962

https://github.com/godotengine/godot/blob/eee39f004b42a4948af90cdebedf65c34a4a4970/editor/editor_vcs_interface.cpp#L362-L380