feat: Add placeholder examples for all features

This commit adds placeholder Go programs to the `examples` directory for
all of Borg's features. This provides a clear roadmap for future
implementation and ensures that we have a testing strategy for each
function.

The new placeholder examples are:
- `examples/all`
- `examples/collect_github_release`
- `examples/collect_github_repo`
- `examples/collect_github_repos`
- `examples/collect_pwa`
- `examples/collect_website`
- `examples/serve`

examples/all/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'all' example.")
+}

examples/collect_github_release/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'collect github release' example.")
+}

examples/collect_github_repo/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'collect github repo' example.")
+}

examples/collect_github_repos/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'collect github repos' example.")
+}

examples/collect_pwa/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'collect pwa' example.")
+}

examples/collect_website/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'collect website' example.")
+}

examples/serve/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("This is a placeholder for the 'serve' example.")
+}