Update workflow triggers (swiftlang#114)

Updates github workflows to reigger on any pull request and creation of
new pull requests.

Author: rauhul

.github/workflows/build-esp.yml

@@ -4,10 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
-  schedule:
-    # Build on Mondays at 9am PST every week
-    - cron: '0 17 * * 1'
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   build-esp:

.github/workflows/build-nuttx.yml

@@ -4,10 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
-  schedule:
-    # Build on Mondays at 9am PST every week
-    - cron: '0 17 * * 1'
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   build-nuttx:

.github/workflows/build-pico-sdk.yml

@@ -4,10 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
-  schedule:
-    # Build on Mondays at 9am PST every week
-    - cron: '0 17 * * 1'
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   build-pico-sdk:

.github/workflows/build-rpi-baremetal.yml

@@ -4,10 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
-  schedule:
-    # Build on Mondays at 9am PST every week
-    - cron: '0 17 * * 1'
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   build-rpi-baremetal:

.github/workflows/build-stm.yml

@@ -4,10 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
-  schedule:
-    # Build on Mondays at 9am PST every week
-    - cron: '0 17 * * 1'
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   build-stm32:

.github/workflows/build-zephyr.yml

@@ -4,10 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
-  schedule:
-    # Build on Mondays at 9am PST every week
-    - cron: '0 17 * * 1'
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   build-zephyr:

.github/workflows/lint.yml

@@ -4,7 +4,9 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    branches: ["main"]
+    types: [opened, reopened, synchronize]
+  repository_dispatch:
+    types: [create-pull-request]
 
 jobs:
   validate_format_config: