docs(roadmap): Added roadmap

docs/roadmap.md

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+# Roadmap
+
+While we're moving towards a major release, here's a few features that you can look forward to over the 
+next few minor ones:
+
+## Short-term
+### Better authentication
+Support for more authentication methods, such as discord, google, oauth, etc.
+
+Accounts shouldn't be locked down to just Drop. We'd like to not only support username / password login,
+but OAuth, 2FA, U2F, magic links, and as many other authentication methods as we can.
+
+Along with that, setting up user / group permissions are also planned, to give admins a more fine-grained
+control over who has access to what.
+
+### Connecting to multiple servers (client-side only)
+Let users connect to and manage games from more than one server
+
+This one is especially something that we've had requested from indie devs, but being able to access
+multiple Drop servers could lead to a much larger ecosystem where it's realistic for an indie dev
+to self-host their own games without Steam's 30%
+
+## Mid-term
+### Launch tooling
+Open support for customising the toolchain with which your games are run with
+
+While [UMU](https://github.com/Open-Wine-Components/umu-launcher) is great, people often have specific
+configurations that we can't really account for out of the box. To remedy this, we'd like to open Drop
+up to essentially fully customised launch sequences for any game, such as setting launch args from the
+client, configuring, deleting, and backing up prefixes, or setting ENV values.
+
+We also recognise the value in being able to completely customise the way that your games are run,
+whether it be by passing them through a remote-play app, an emulator, or anything else of the sort.
+
+### Cloud save management
+Support for cloud saves, making it easier to manage saves across different devices and operating systems.
+
+We're looking at using the [ludusavi manifest](https://github.com/mtkennerly/ludusavi-manifest) to figure
+out relevant folders and files to be backed up to ideally any remote location.
+
+## Long-term
+### Social features
+Support for social features, such as friends, groups, and other social interactions like current game status.
+
+People don't always play games with themselves, and so we'd like to add a variety of chat features, friends
+updates, and other various features that can also be found in Steam's "Friends" and "Community" tabs.
+
+### Multiplayer support
+Support for multiplayer server management, such as discovering servers, joining servers, and leaving servers.
+
+Intended as a drop-in replacement for the SteamWorks API, we'd like to provide support for multiplayer support
+through the drop server, referencing the [Goldberg Emulator](https://gitlab.com/Mr_Goldberg/goldberg_emulator),
+as it has the most complete collection of headers that we can find.