Update Java Simulation Examples (#913)

Removes apriltagExample and simposeest, replacing them with swervedriveposeestsim

---------

Co-authored-by: Matt <matthew.morley.ca@gmail.com>

photonlib-cpp-examples/README.md

@@ -0,0 +1,7 @@
+## PhotonLib C++ Examples
+
+### Running examples
+
+For instructions on how to run these examples locally, see [Running Examples](https://docs.photonvision.org/en/latest/docs/contributing/photonvision/build-instructions.html#running-examples).
+
+---

photonlib-cpp-examples/build.gradle

@@ -27,9 +27,11 @@ spotless {
     }
 }
 
+apply from: "examples.gradle"
+
 // Task that depends on the build task for every example
 task buildAllExamples { task ->
-    new File('examples.txt').eachLine { line ->
+    exampleFolderNames.each { line ->
         task.dependsOn(line + ":build")
     }
 }

photonlib-cpp-examples/examples.gradle

@@ -0,0 +1,14 @@
+// These should be the only 2 non-project subdirectories in the examples folder
+// I could check for (it)/build.gradle to exist, but w/e
+def EXCLUDED_DIRS = ["bin", "build"]
+
+// List all non-hidden directories not in EXCUDED_DIRS
+ext.exampleFolderNames = file("${rootDir}")
+    .listFiles()
+    .findAll {
+        return (it.isDirectory()
+            && !it.isHidden()
+            && !(it.name in EXCLUDED_DIRS) && !it.name.startsWith(".")
+            && it.toPath().resolve("build.gradle").toFile().exists())
+    }
+    .collect { it.name }

photonlib-cpp-examples/examples.txt

@@ -1,4 +0,0 @@
-aimandrange
-getinrange
-aimattarget
-apriltagExample

photonlib-cpp-examples/settings.gradle

@@ -1 +1,3 @@
-new File('examples.txt').eachLine { line -> include line }
+apply from: "examples.gradle"
+
+exampleFolderNames.each { line -> include line }