Core: Remove thema and kindsys dependencies (#84499)

* Move some thema code inside grafana

* Use new codegen instead of thema for core kinds

* Replace TS generator

* Use new generator for go types

* Remove thema from oapi generator

* Remove thema from generators

* Don't use kindsys/thema for core kinds

* Remove kindsys/thema from plugins

* Remove last thema related

* Remove most of cuectx and move utils_ts into codegen. It also deletes wire dependency

* Merge plugins generators

* Delete thema dependency 🎉

* Fix CODEOWNERS

* Fix package name

* Fix TS output names

* More path fixes

* Fix mod codeowners

* Use original plugin's name

* Remove kindsys dependency 🎉

* Modify oapi schema and create an apply function to fix elasticsearch errors

* cue.mod was deleted by mistake

* Fix TS panels

* sort imports

* Fixing elasticsearch output

* Downgrade oapi-codegen library

* Update output ts files

* More fixes

* Restore old elasticsearch generated file and skip its generation. Remove core imports into plugins

* More lint fixes

* Add codeowners

* restore embed.go file

* Fix embed.go

pkg/plugins/pfs/decl.go

@@ -1,18 +1,16 @@
 package pfs
 
 import (
+	"cuelang.org/go/cue"
 	"cuelang.org/go/cue/ast"
-	"github.com/grafana/kindsys"
-	"github.com/grafana/thema"
 )
 
 type PluginDecl struct {
-	SchemaInterface *SchemaInterface
-	Lineage         thema.Lineage
+	SchemaInterface SchemaInterface
+	CueFile         cue.Value
 	Imports         []*ast.ImportSpec
 	PluginPath      string
 	PluginMeta      Metadata
-	KindDecl        kindsys.Def[kindsys.ComposableProperties]
 }
 
 type SchemaInterface struct {
@@ -26,15 +24,3 @@ type Metadata struct {
 	Backend *bool
 	Version *string
 }
-
-func EmptyPluginDecl(path string, meta Metadata) *PluginDecl {
-	return &PluginDecl{
-		PluginPath: path,
-		PluginMeta: meta,
-		Imports:    make([]*ast.ImportSpec, 0),
-	}
-}
-
-func (decl *PluginDecl) HasSchema() bool {
-	return decl.Lineage != nil && decl.SchemaInterface != nil
-}