feat: deprecate dedicated flagd in-process provider (#396)

Signed-off-by: Kavindu Dodanduwa <kavindudodanduwa@gmail.com>
Signed-off-by: Kavindu Dodanduwa <Kavindu-Dodan@users.noreply.github.com>
Co-authored-by: Giovanni Liva <giovanni.liva@dynatrace.com>

providers/flagd-in-process/README.md

@@ -1,4 +1,8 @@
-# In-process Flagd Provider
+# DEPRECATED - In-process Flagd Provider 
+
+> [!IMPORTANT]
+> This provider is DEPRECATED and will be removed soon.
+> [flagd provider](../flagd/README.md) now supports in-process flag evaluation and it will be maintained as a single package.
 
 This provider implements parts of the functionality of [Flagd](https://github.com/open-feature/flagd), and follows its
 specification for [in-process providers](https://flagd.dev/reference/specifications/in-process-providers/).

providers/flagd-in-process/pkg/provider.go

@@ -59,6 +59,7 @@ type connectionInfo struct {
 
 type connectionState int
 
+// Deprecated: Please use flagd with WithInProcessResolver option instead of this dedicated provider
 type Provider struct {
 	ctx                   context.Context
 	cancelFunc            context.CancelFunc
@@ -80,6 +81,7 @@ type ProviderConfiguration struct {
 
 type ProviderOption func(*Provider)
 
+// Deprecated : Please use flagd with WithInProcessResolver option instead of this dedicated provider
 func NewProvider(ctx context.Context, opts ...ProviderOption) *Provider {
 	ctx, cancel := context.WithCancel(ctx)
 	provider := &Provider{