feat: add desktop repo (#1071)

packages/desktop/README.md

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+# Standard Notes
+
+<div align="center">
+
+[![latest release version](https://img.shields.io/github/v/release/standardnotes/desktop)](https://github.com/standardnotes/desktop/releases)
+[![License](https://img.shields.io/github/license/standardnotes/desktop?color=blue)](https://github.com/standardnotes/desktop/blob/master/LICENSE)
+[![Slack](https://img.shields.io/badge/slack-standardnotes-CC2B5E.svg?style=flat&logo=slack)](https://standardnotes.com/slack)
+[![Twitter Follow](https://img.shields.io/badge/follow-%40standardnotes-blue.svg?style=flat&logo=twitter)](https://twitter.com/standardnotes)
+
+</div>
+
+This application makes use of the core JS/CSS/HTML code found in the [web repo](https://github.com/standardnotes/app). For issues related to the actual app experience, please post issues in the web repo.
+
+## Running Locally
+
+Make sure [Yarn](https://classic.yarnpkg.com/en/) is installed on your system.
+
+```bash
+yarn setup
+yarn build:web # Or `yarn dev:web`
+yarn dev
+
+# In another terminal
+yarn start
+```
+
+We use [commitlint](https://github.com/conventional-changelog/commitlint) to validate commit messages.
+Before making a pull request, make sure to check the output of the following commands:
+
+```bash
+yarn lint
+yarn test # Make sure to start `yarn dev` before running the tests, and quit any running Standard Notes applications so they don't conflict.
+```
+
+Pull requests should target the `develop` branch.
+
+### Installing dependencies
+
+To determine where to install a dependency:
+
+- If it is only required for building, install it in `package.json`'s `devDependencies`
+- If it is required at runtime but can be packaged by webpack, install it in `package.json`'s `dependencies`.
+- If it must be distributed as a node module (not packaged by webpack), install it in `app/package.json`'s `dependencies`
+  - Also make sure to declare it as an external commonjs dependency in `webpack.common.js`.
+
+## Building
+
+Build for all platforms:
+
+- `yarn release`
+
+## Building natively on arm64
+
+Building arm64 releases on amd64 systems is only possible with AppImage, Debian and universal "dir" targets.
+
+Building arm64 releases natively on arm64 systems requires some additional preparation:
+
+- `export npm_config_target_arch=arm64`
+- `export npm_config_arch=arm64`
+
+A native `fpm` installation is needed for Debian builds. `fpm` needs to be available in `$PATH`, which can be achieved by running
+
+- `gem install fpm --no-document`
+
+and making sure `$GEM_HOME/bin` is added to `$PATH`.
+
+Snap releases also require a working snapcraft / `snapd` installation.
+
+Building can then be done by running:
+
+- `yarn setup`
+
+Followed by
+
+- `node scripts/build.mjs deb-arm64`
+
+## Installation
+
+On Linux, download the latest AppImage from the [Releases](https://github.com/standardnotes/desktop/releases/latest) page, and give it executable permission:
+
+`chmod u+x standard-notes*.AppImage`