Import YEEP-144 library 1.2 sources

Source-only snapshot of the 1.2 release. Drivers/ (the vendored ST HAL and
CMSIS) is excluded at 173 MB; fetch it from STMicroelectronics/STM32CubeH5 to
build.

.vscode/c_cpp_properties.json

@@ -0,0 +1,8 @@
+{
+    "configurations": [
+        {
+            "name": "STM32",
+            "compileCommands": "${workspaceFolder}/build/Debug/compile_commands.json"
+        }
+    ]
+}

.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "stlinkgdbtarget",
+            "request": "launch",
+            "name": "STM32Cube: Launch ST-Link GDB Server",
+            "origin": "snippet",
+            "cwd": "${workspaceFolder}",
+            "preBuild": "${command:st-stm32-ide-debug-launch.build}",
+            "runEntry": "main",
+            "imagesAndSymbols": [
+                {
+                    "imageFileName": "${command:st-stm32-ide-debug-launch.get-projects-binary-from-context1}"
+                }
+            ]
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,15 @@
+{
+    "cmake.cmakePath": "cube-cmake",
+    "cmake.configureArgs": [
+        "-DCMAKE_COMMAND=cube-cmake"
+    ],
+    "cmake.preferredGenerators": [
+        "Ninja"
+    ],
+    "stm32cube-ide-clangd.path": "cube",
+    "stm32cube-ide-clangd.arguments": [
+        "starm-clangd",
+        "--query-driver=${env:CUBE_BUNDLE_PATH}/gnu-tools-for-stm32/14.3.1+st.2/bin/arm-none-eabi-gcc*",
+        "--query-driver=${env:CUBE_BUNDLE_PATH}/gnu-tools-for-stm32/14.3.1+st.2/bin/arm-none-eabi-g++*"
+    ]
+}

.vscode/tasks.json

@@ -0,0 +1,65 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "shell",
+			"label": "CubeProg: Flash project (SWD)",
+			"command": "cube",
+			"args": [
+				"programmer",
+				"--connect",
+				"port=swd",
+				"--download",
+				"${command:cmake.launchTargetPath}",
+				"-hardRst",
+				"-rst",
+				"--start"
+			],
+			"options": {
+				"cwd": "${workspaceFolder}"
+			},
+			"problemMatcher": [],
+			"presentation": {
+				"showReuseMessage": false
+			}
+		},
+		{
+			"label": "Build + Flash",
+			"dependsOrder": "sequence",
+			"dependsOn": [
+				"CMake: clean rebuild",
+				"CubeProg: Flash project (SWD)"
+			],
+			"problemMatcher": [
+				"$gcc"
+			],
+			"presentation": {
+				"showReuseMessage": false
+			}
+		},
+		{
+			"type": "cmake",
+			"label": "CMake: clean rebuild",
+			"command": "cleanRebuild",
+			"targets": [
+				"all"
+			],
+			"preset": "Debug",
+			"group": "build",
+			"problemMatcher": [],
+			"detail": "CMake template clean rebuild task"
+		},
+		{
+			"type": "cmake",
+			"label": "CMake: configure",
+			"command": "configure",
+			"preset": "Debug",
+			"problemMatcher": [],
+			"detail": "CMake template configure task"
+		},
+		{
+			"label": "Configure and Build",
+			"dependsOn": ["CMake: configure", "${command:st-stm32-ide-debug-launch.build}"],
+			"dependsOrder": "sequence"}
+		]
+	}