Add GitHub Actions workflows for build, release, and PR download link

.github/workflows/build.yml

@@ -0,0 +1,40 @@
+name: Build
+
+on:
+    pull_request:
+        branches:
+            - main
+    push:
+        branches:
+            - main
+
+jobs:
+    build:
+        name: Build
+        runs-on: ubuntu-latest
+        steps:
+            - name: Check out code
+              uses: actions/checkout@v5
+
+            - name: Set up Go
+              uses: actions/setup-go@v5
+              with:
+                  go-version-file: go.mod
+
+            - name: Install TinyGo
+              run: |
+                  wget https://github.com/tinygo-org/tinygo/releases/download/v0.40.1/tinygo_0.40.1_amd64.deb
+                  sudo dpkg -i tinygo_0.40.1_amd64.deb
+                  sudo apt install -y binaryen
+
+            - name: Run tests
+              run: make test
+
+            - name: Build and package plugin
+              run: make package
+
+            - name: Upload artifact
+              uses: actions/upload-artifact@v4
+              with:
+                  name: discord-rich-presence
+                  path: discord-rich-presence.ndp

.github/workflows/release.yml

@@ -0,0 +1,41 @@
+name: Release
+
+on:
+    push:
+        tags:
+            - "v*"
+
+permissions:
+    contents: write
+
+jobs:
+    release:
+        name: Release
+        runs-on: ubuntu-latest
+        steps:
+            - name: Check out code
+              uses: actions/checkout@v5
+
+            - name: Set up Go
+              uses: actions/setup-go@v5
+              with:
+                  go-version-file: go.mod
+
+            - name: Install TinyGo
+              run: |
+                  wget https://github.com/tinygo-org/tinygo/releases/download/v0.40.1/tinygo_0.40.1_amd64.deb
+                  sudo dpkg -i tinygo_0.40.1_amd64.deb
+                  sudo apt install -y binaryen
+
+            - name: Run tests
+              run: make test
+
+            - name: Build and package plugin
+              run: make package
+
+            - name: Create release
+              uses: softprops/action-gh-release@v2
+              with:
+                  draft: true
+                  files: discord-rich-presence.ndp
+                  generate_release_notes: true

.github/workflows/update-link-on-pr.yml

@@ -0,0 +1,36 @@
+name: Add download link to PR
+
+on:
+    workflow_run:
+        workflows: ["Build"]
+        types: [completed]
+
+jobs:
+    pr_comment:
+        if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
+        runs-on: ubuntu-latest
+        permissions:
+            pull-requests: write
+        steps:
+            - name: Get PR number
+              id: pr
+              uses: actions/github-script@v7
+              with:
+                  script: |
+                      const pulls = await github.rest.pulls.list({
+                        owner: context.repo.owner,
+                        repo: context.repo.repo,
+                        state: 'open'
+                      });
+                      const pr = pulls.data.find(p => p.head.sha === '${{ github.event.workflow_run.head_sha }}');
+                      if (pr) {
+                        core.setOutput('number', pr.number);
+                      }
+
+            - name: Add download link comment
+              if: steps.pr.outputs.number
+              uses: marocchino/sticky-pull-request-comment@v2
+              with:
+                  number: ${{ steps.pr.outputs.number }}
+                  message: |
+                      Download the plugin for this PR: [discord-rich-presence.zip](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.event.workflow_run.id }}/discord-rich-presence.zip)