feat: migrate R session IPC to modern sess package

- Remove legacy file-based watchers (request.log, workspace.json, etc.)
- Establish WebSocket (Push) and HTTP (Pull) connection directly to R's sess server
- Refactor sessionRequest to use JSON-RPC 2.0 payloads via /rpc endpoint
- Directly dispatch RStudio API emulation commands via WebSocket instead of polling

Author: randy3k

.vscode/launch.json

@@ -15,6 +15,7 @@
       "outFiles": [
         "${workspaceFolder}/out/src/**/*.js"
       ],
+      "sourceMaps": true,
     },
     {
       "name": "Launch Extension (--disable-extensions)",
@@ -28,6 +29,7 @@
       "outFiles": [
         "${workspaceFolder}/out/src/**/*.js"
       ],
+      "sourceMaps": true,
     },
     {
       "name": "Extension Tests",
@@ -44,4 +46,4 @@
       "preLaunchTask": "npm: pretest"
     }
   ]
-}
+}

R/session/profile.R R/profile.RR/session/profile.R renamed to R/profile.R

@@ -24,10 +24,6 @@ local({
     invisible()
 })
 
-# Run vscode initializer
-local({
-    init_file <- Sys.getenv("VSCODE_INIT_R")
-    if (nzchar(init_file)) {
-        source(init_file, chdir = TRUE, local = TRUE)
-    }
-})
+if (requireNamespace("sess", quietly = TRUE)) {
+    sess::sess_app()
+}