* docs: update discordapp.com to discord.com

Signed-off-by: Seth Falco <seth@falco.fun>

* add visualstudiocode to gitignore

Signed-off-by: Seth Falco <seth@falco.fun>

* Add signoff workflow

* Add bridges

* changelog

* Drop support for Node 12
Enable support for Node 18

* Don't be too hasty

* changelog

* Use `yarn` instead of `npm` in docs and scripts

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Enforce node and yarn versions

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Give up on trying to auto-enforce yarn 1.x

Instead, just document how to install it

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Changelog: Clarify that Yarn is required

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Update contributing guide

Fixes #786

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Commonize PR template with IRC bridge

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* changelog

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Add towncrier

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* .gitkeep -> git.keep

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Remove unused changelog-check script

check-newsfragment script is used instead

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

* Update check-newsfragment script

- Link to the correct PR guidelines
- Filter out git.keep

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

Fix CI build, lint, and test

- Set `_bot` on DiscordBot instances instead of its getter
- Add a missing await to prevent a potential test timeout

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

Had to be done manually due to matrix-discord-parser pulling in a `git:`
dependency of its own.

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

Using Git over HTTPS instead.

Unencrypted `git://` does not seem to be supported by GitHub anymore:
https://github.blog/2021-09-01-improving-git-protocol-security-github/

This prevented the package from building on NixOS:
https://github.com/NixOS/nixpkgs/issues/165246

Handle invalid Discord tokens gracefully

Add Github CI for linting and tests

Implement RMAU tracking and optionally blocking the bridge after a RMAU limit is reached

This makes us dependent on matrix-appservice-bridge to make use of
UserActivityTracker and BridgeBlocker, which also bumps matrix-bot-sdk
to a higher required version.

Do not use default

Allow admins to disable portal rooms and enforce room limits

Metrics.enable: Correct config sample and schema

Merge branch 'cos/update_sdk_version' of https://github.com/vranki/matrix-appservice-discord into develop

Merge branch 'j94/copy-changes' of https://github.com/jaller94/matrix-appservice-discord into develop