Add publishing docs (#18)

* Fix incorrect URLs being generated for Github and GitLab repositories

* Bump up version

* Add publishing instructions to the repository

Author: SeriousBug

docs/.gitignore

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+.obsidian

docs/publishing-instructions.md

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+# Publishing Instructions
+
+To get the extension published, follow these steps:
+
+1. If you have not already, update the version in `package.json` and merge that change into main.
+2. Create a new release on Github, upload the built distribution packages. Use the "Generate changelog" to generate the list of changes.
+3. For Chrome:
+   1. Go to https://chrome.google.com/webstore/devconsole/
+   2. Click "Package" on the left, then press "Upload new package"
+   3. Upload the `devpod-ext-chrome-<version>.zip` file.
+   4. Update any information needed, then hit "Submit for review"
+4. For Edge:
+   1. Go to https://partner.microsoft.com/en-us/dashboard/microsoftedge/overview
+   2. Select the extension, then press "Update"
+   3. Click "Replace" and upload `devpod-ext-chrome-<version>.zip`
+   4. Click "Continue", then "Publish"
+5. For Firefox:
+   1. Go to https://addons.mozilla.org/en-US/developers/addons
+   2. Select the extension, then press "Upload New Version"
+   3. Upload `devpod-ext-firefox-<version>.zip`. Make sure it's the firefox one!
+   4. Answer yes to the next question. Download the zip of the source code from Github (under "Code", at the bottom) and upload the source code.
+   5. Copy and paste the changelog from the Github release.
+   6. Submit the extension for review.