feat(.devcontainer, .vscode, add .zed): add more devcontainer lang extensions and clean up, add more extensions to .vscode, create .zed folder and install extensions there too (#7520)

* feat: add more devcontainer lang extensions, clean up a bit

Signed-off-by: Owen-sz <owen@fyralabs.com>

* add: more recommended vscode extensions

Signed-off-by: Owen-sz <owen@fyralabs.com>

* add: .zed folder, and extensions to auto-install

Signed-off-by: Owen-sz <owen@fyralabs.com>

* smh I literally made it .jsonc earlier

Signed-off-by: Owen-sz <owen@fyralabs.com>

---------

Signed-off-by: Owen-sz <owen@fyralabs.com>

.devcontainer/devcontainer.json

@@ -1,16 +1,17 @@
 {
   "name": "Terra Devcontainer",
   "image": "ghcr.io/terrapkg/builder:frawhide",
-  "runArgs": [
-    "--privileged"
-  ],
+  "runArgs": ["--privileged"],
   "features": {
     "ghcr.io/devcontainers/features/common-utils:2": {}
   },
   "customizations": {
     "vscode": {
       "extensions": [
-        "rhaiscript.vscode-rhai"
+        "rhaiscript.vscode-rhai",
+        "1dot75cm.rpmspec",
+        "hashicorp.hcl",
+        "redhat.vscode-xml"
       ]
     }
   },