Update event triggers on CI actions (#126)

* Update event triggers on CI actions

This includes `on: pull_request` and `on: workflow_dispatch` to CI test triggers. The first will run actions when a branch is converted to a PR (and doesn't trigger the existing `push`). The latter allows Manual triggering of actions on branches.

* Add event triggers to reactjs-tests.yml workflow action

* Limit on:push event triggers to master branch only

* Add event triggers to clang-format.yml workflow action

.github/workflows/clang-format.yml

@@ -1,6 +1,11 @@
 name: clang-format
 
-on: [push]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
 
 jobs:
   build:

.github/workflows/cpp-tests.yml

@@ -2,8 +2,14 @@ name: cpp-tests
 
 on:
   push:
+    branches:
+      - master
     paths-ignore:
       - "*.md"
+  pull_request:
+    paths-ignore:
+      - "*.md"
+  workflow_dispatch:
 
 env:
   # Path to the solution file relative to the root of the project.

.github/workflows/reactjs-tests.yml

@@ -5,8 +5,14 @@ name: reactjs-tests
 
 on:
   push:
+    branches:
+      - master
     paths-ignore:
       - "*.md"
+  pull_request:
+    paths-ignore:
+      - "*.md"
+  workflow_dispatch:
 
 jobs:
   build: