Plugins: Add Plugin FS abstraction (#63734)

* unexport pluginDir from dto

* first pass

* tidy

* naming + add mutex

* add dupe checking

* fix func typo

* interface + move logic from renderer

* remote finder

* remote signing

* fix tests

* tidy up

* tidy markdown logic

* split changes

* fix tests

* slim interface down

* fix status code

* tidy exec path func

* fixup

* undo changes

* remove unused func

* remove unused func

* fix goimports

* fetch remotely

* simultaneous support

* fix linter

* use var

* add exception for gosec warning

* fixup

* fix tests

* tidy

* rework cfg pattern

* simplify

* PR feedback

* fix dupe field

* remove g304 nolint

* apply PR feedback

* remove unnecessary gosec nolint

* fix finder loop and update comment

* fix map alloc

* fix test

* remove commented code

pkg/plugins/ifaces.go

@@ -2,6 +2,7 @@ package plugins
 
 import (
 	"context"
+	"io/fs"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 
@@ -38,6 +39,23 @@ type UpdateInfo struct {
 	PluginZipURL string
 }
 
+type FS interface {
+	fs.FS
+
+	Base() string
+	Files() []string
+}
+
+type FoundBundle struct {
+	Primary  FoundPlugin
+	Children []*FoundPlugin
+}
+
+type FoundPlugin struct {
+	JSONData JSONData
+	FS       FS
+}
+
 // Client is used to communicate with backend plugin implementations.
 type Client interface {
 	backend.QueryDataHandler