feat: add support for coder_script (#9584)

* Add basic migrations

* Improve schema

* Refactor agent scripts into it's own package

* Support legacy start and stop script format

* Pipe the scripts!

* Finish the piping

* Fix context usage

* It works!

* Fix sql query

* Fix SQL query

* Rename `LogSourceID` -> `SourceID`

* Fix the FE

* fmt

* Rename migrations

* Fix log tests

* Fix lint err

* Fix gen

* Fix story type

* Rename source to script

* Fix schema jank

* Uncomment test

* Rename proto to TimeoutSeconds

* Fix comments

* Fix comments

* Fix legacy endpoint without specified log_source

* Fix non-blocking by default in agent

* Fix resources tests

* Fix dbfake

* Fix resources

* Fix linting I think

* Add fixtures

* fmt

* Fix startup script behavior

* Fix comments

* Fix context

* Fix cancel

* Fix SQL tests

* Fix e2e tests

* Interrupt on Windows

* Fix agent leaking script process

* Fix migrations

* Fix stories

* Fix duplicate logs appearing

* Gen

* Fix log location

* Fix tests

* Fix tests

* Fix log output

* Show display name in output

* Fix print

* Return timeout on start context

* Gen

* Fix fixture

* Fix the agent status

* Fix startup timeout msg

* Fix command using shared context

* Fix timeout draining

* Change signal type

* Add deterministic colors to startup script logs

---------

Co-authored-by: Muhammad Atif Ali <atif@coder.com>

agent/agentscripts/agentscripts_other.go

@@ -0,0 +1,20 @@
+//go:build !windows
+
+package agentscripts
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func cmdSysProcAttr() *syscall.SysProcAttr {
+	return &syscall.SysProcAttr{
+		Setsid: true,
+	}
+}
+
+func cmdCancel(cmd *exec.Cmd) func() error {
+	return func() error {
+		return syscall.Kill(-cmd.Process.Pid, syscall.SIGHUP)
+	}
+}