feat: add autodiscover enabled feature (#3895)

* add flag to allow the user disable the autodiscover

* add global config and doc

* feat: Implement autodiscover.mode

* fix: Minor doc fixes

* fix: Small fixes to docs/indent/tests

* fix: Line length, quoting, function comments

* fix: Add a few more tests and remove newlines

* fix: Always camel case never snake

---------

Co-authored-by: Marcelo Medeiros <m.medeiros@carepay.com>
Co-authored-by: nitrocode <7775707+nitrocode@users.noreply.github.com>
Co-authored-by: PePe Amengual <jose.amengual@gmail.com>

cmd/server_test.go

@@ -60,6 +60,7 @@ var testFlags = map[string]interface{}{
 	AllowCommandsFlag:                "version,plan,unlock,import,approve_policies", // apply is disabled by DisableApply
 	AllowForkPRsFlag:                 true,
 	AllowRepoConfigFlag:              true,
+	AutoDiscoverModeFlag:             "auto",
 	AutomergeFlag:                    true,
 	AutoplanFileListFlag:             "**/*.tf,**/*.yml",
 	BitbucketBaseURLFlag:             "https://bitbucket-base-url.com",