feat: improve resources_monitoring for OOM & OOD monitoring (#16241)

As requested for [this
issue](https://github.com/coder/internal/issues/245) we need to have a
new resource `resources_monitoring` in the agent.

It needs to be parsed from the provisioner and inserted into a new db
table.

provisionersdk/proto/provisioner.proto

@@ -129,6 +129,7 @@ message Agent {
 	repeated Script scripts = 21;
 	repeated Env extra_envs = 22;
 	int64 order = 23;
+	ResourcesMonitoring resources_monitoring = 24;
 }
 
 enum AppSharingLevel {
@@ -137,6 +138,22 @@ enum AppSharingLevel {
     PUBLIC = 2;
 }
 
+message ResourcesMonitoring {
+	MemoryResourceMonitor memory = 1;
+	repeated VolumeResourceMonitor volumes = 2;
+}
+
+message MemoryResourceMonitor {
+	bool enabled = 1;
+	int32 threshold = 2;
+}
+
+message VolumeResourceMonitor {
+	string path = 1;
+	bool enabled = 2;
+	int32 threshold = 3;
+}
+
 message DisplayApps {
     bool vscode = 1;
     bool vscode_insiders = 2;