Add CMS Management Functionality

- Introduced a new CMS management feature, including the ability to create, retrieve, update, search, and delete CMS entries.
- Implemented the CMS entity, repository, service, and handler layers following Clean Architecture principles.
- Added API endpoints for CMS operations in Swagger documentation, ensuring comprehensive API specifications.
- Enhanced error handling and validation for CMS data, improving robustness and user experience.
- Updated the main application to initialize the CMS repository and service, integrating them into the existing system.

internal/cms/entity.go

@@ -0,0 +1,110 @@
+package cms
+
+import (
+	"tm/pkg/mongo"
+
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// CMS represents the content management system for the landing page
+type CMS struct {
+	mongo.Model `bson:",inline"`
+	Key         string         `bson:"key" json:"key" validate:"required"`
+	Hero        heroSection    `bson:"hero" json:"hero"`
+	Chart       chartSection   `bson:"chart" json:"chart"`
+	Features    cardSection    `bson:"features" json:"features"`
+	Challenges  cardSection    `bson:"challenges" json:"challenges"`
+	Advantages  cardSection    `bson:"advantages" json:"advantages"`
+	Contact     contactSection `bson:"contact" json:"contact"`
+	Footer      footerSection  `bson:"footer" json:"footer"`
+}
+
+// SetID sets the CMS ID (implements IDSetter interface)
+func (c *CMS) SetID(id string) {
+	c.ID, _ = bson.ObjectIDFromHex(id)
+}
+
+// GetID returns the CMS ID (implements IDGetter interface)
+func (c *CMS) GetID() string {
+	return c.ID.Hex()
+}
+
+// SetCreatedAt sets the created timestamp (implements Timestamp interface)
+func (c *CMS) SetCreatedAt(timestamp int64) {
+	c.CreatedAt = timestamp
+}
+
+// SetUpdatedAt sets the updated timestamp (implements Timestamp interface)
+func (c *CMS) SetUpdatedAt(timestamp int64) {
+	c.UpdatedAt = timestamp
+}
+
+// GetCreatedAt returns the created timestamp (implements Timestamp interface)
+func (c *CMS) GetCreatedAt() int64 {
+	return c.CreatedAt
+}
+
+// GetUpdatedAt returns the updated timestamp (implements Timestamp interface)
+func (c *CMS) GetUpdatedAt() int64 {
+	return c.UpdatedAt
+}
+
+// heroSection represents the hero section of the landing page
+type heroSection struct {
+	Title       string `bson:"title"`
+	Description string `bson:"description"`
+	ButtonText  string `bson:"button_text"`
+	ButtonLink  string `bson:"button_link"`
+	GifFile     string `bson:"gif_file"`
+}
+
+// chartSection represents the chart section of the landing page
+type chartSection struct {
+	Title        string       `bson:"title" json:"title"`
+	MissedAmount string       `bson:"missed_amount" json:"missedAmount"`
+	Data         []chartPoint `bson:"data" json:"data"`
+}
+
+type chartPoint struct {
+	Key   string `bson:"key" json:"key"`
+	Value int    `bson:"value" json:"value"`
+}
+
+// cardSection represents the card section of the landing page
+type cardSection struct {
+	Title       string `bson:"title"`
+	Description string `bson:"description"`
+	Cards       []card `bson:"cards"`
+}
+
+// card represents a card in the card section
+type card struct {
+	Icon        string `bson:"icon"`
+	Title       string `bson:"title"`
+	Description string `bson:"description"`
+}
+
+// contactSection represents the contact section of the landing page
+type contactSection struct {
+	Title            string      `bson:"title"`
+	Description      string      `bson:"description"`
+	SubmitButtonText string      `bson:"submit_button_text"`
+	Fields           []formField `bson:"fields"`
+}
+
+// formField represents a form field in the contact section
+type formField struct {
+	Name        string `bson:"name"`
+	Label       string `bson:"label"`
+	Placeholder string `bson:"placeholder"`
+	Required    bool   `bson:"required"`
+}
+
+// footerSection represents the footer section of the landing page
+type footerSection struct {
+	Email     string `bson:"email"`
+	Phone     string `bson:"phone"`
+	Location  string `bson:"location"`
+	Tagline   string `bson:"tagline"`
+	Copyright string `bson:"copyright"`
+}