Devcontainer (#29259)

* mvp devcontainer. builds, runs and UI works

* fix indentation

* enable color and fix openpilot_env path

* separate dockerfile for devcontainer

* use prebuilt image

* Fix openpilot_env setup

* Add dev container section in readme

* Fix typo

* Fix typo again

* Move dev dockerfile to .devcontainer dir

* Update README

* Add note about x11 forwarding on macos

* Update dev container json

* Fix typo

* Override DISPLAY on macOS

* Mention XAUTHORITY for macOS setup in README

* fix typo

* Add devcontainer CI test

* Rename to devcontainer

* Fix git issues

* ripgrep

* Link instead of vscode manual

* Replace raw path with containerWorkspaceFolder

* Fix typo

* Remove dev tools workflow

* Link away X11 forwarding setup isntructions for mac

* Remove fork consrtaint, add test run of scons

* Add submodules as safe.directories in postStartCommand

* Remove openpilot_env references

* Add scons cache volume

---------

Co-authored-by: Robbe Derks <robbe@localhost.localdomain>
Co-authored-by: Kacper Rączy <gfw.kra@gmail.com>
old-commit-hash: d71a7190f1210f5ac97ce16892552ecf495e2437

.devcontainer/devcontainer.json

@@ -0,0 +1,22 @@
+{
+  "name": "openpilot devcontainer",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "postCreateCommand": "bash -c 'if [[ $DISPLAY == *xquartz* ]]; then echo \"export DISPLAY=host.docker.internal:0\" >> /root/.bashrc; fi'",
+  "postStartCommand": "git config --file .gitmodules --get-regexp path | awk '{ print $2 }' | xargs -I{} git config --global --add safe.directory \"$PWD/{}\"",
+  "privileged": true,
+  "containerEnv": {
+    "DISPLAY": "${localEnv:DISPLAY}",
+    "PYTHONPATH": "${containerWorkspaceFolder}",
+    "force_color_prompt": "1"
+  },
+  "runArgs": [
+    "--volume=/tmp/.X11-unix:/tmp/.X11-unix",
+    "--volume=${localEnv:XAUTHORITY}:/root/.Xauthority",
+    "--volume=${localEnv:HOME}/.comma:/root/.comma",
+    "--volume=/tmp/comma_download_cache:/tmp/comma_download_cache",
+    "--volume=/tmp/devcontainer_scons_cache:/tmp/scons_cache",
+    "--shm-size=1G"
+  ]
+}