Move pkg/fswatcher to internal/fswatcher (#6895)

## Which problem is this PR solving?
- Moves `pkg/fswatcher` to `internal/fswatcher` as part of issue #6869 

## Description of the changes
- Moved `pkg/fswatcher` to `internal/fswatcher`  
- Updated all imports referencing `pkg/fswatcher` to
`internal/fswatcher`

## How was this change tested?
- Verified that the code compiles successfully:  
  ```bash
  make build
   ```
 - Ran tests for fswatcher to ensure functionality remains intact:
  ```bash
     go test -v ./internal/fswatcher/...
  ```
- Ran all tests to confirm that no other parts of the project were
affected:
  ```bash
     make test
  ```

## Checklist
- [ ] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [ ] I have signed all commits
- [ ] I have added unit tests for the new functionality
- [ ] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `npm run lint` and `npm run test`

---------

Signed-off-by: sAchin-680 <[email protected]>
Signed-off-by: Yuri Shkuro <[email protected]>
Co-authored-by: Yuri Shkuro <[email protected]>
Co-authored-by: Yuri Shkuro <[email protected]>

Author: sAchin-680

cmd/query/app/static_handler.go

@@ -21,7 +21,7 @@ import (
 
 	"github.com/jaegertracing/jaeger/cmd/query/app/querysvc"
 	"github.com/jaegertracing/jaeger/cmd/query/app/ui"
-	"github.com/jaegertracing/jaeger/pkg/fswatcher"
+	"github.com/jaegertracing/jaeger/internal/fswatcher"
 	"github.com/jaegertracing/jaeger/pkg/version"
 )
 

cmd/query/app/static_handler_test.go

@@ -27,7 +27,7 @@ import (
 	"github.com/jaegertracing/jaeger/internal/testutils"
 )
 
-//go:generate mockery -all -dir ../../../pkg/fswatcher
+//go:generate mockery -all -dir ../../../internal/fswatcher
 
 func TestNotExistingUiConfig(t *testing.T) {
 	handler, err := NewStaticAssetsHandler("/foo/bar", StaticAssetsHandlerOptions{

pkg/fswatcher/fswatcher.go renamed to internal/fswatcher/fswatcher.go

@@ -20,6 +20,7 @@ import (
 	"go.opentelemetry.io/otel/trace"
 	"go.uber.org/zap"
 
+	"github.com/jaegertracing/jaeger/internal/fswatcher"
 	"github.com/jaegertracing/jaeger/internal/storage/v1"
 	"github.com/jaegertracing/jaeger/internal/storage/v1/api/dependencystore"
 	"github.com/jaegertracing/jaeger/internal/storage/v1/api/samplingstore"
@@ -31,7 +32,6 @@ import (
 	esSpanStore "github.com/jaegertracing/jaeger/internal/storage/v1/elasticsearch/spanstore"
 	"github.com/jaegertracing/jaeger/pkg/es"
 	"github.com/jaegertracing/jaeger/pkg/es/config"
-	"github.com/jaegertracing/jaeger/pkg/fswatcher"
 	"github.com/jaegertracing/jaeger/pkg/metrics"
 )