build: use include instead of exclude for package files

Switch from blacklist to whitelist approach for package contents to ensure
only essential files are included in the published crate.

CHANGELOG.md

@@ -12,6 +12,7 @@ and [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/).
 - [gateway] Check for Free accounts and prevent connecting due to audio ads limitation
 
 ### Changed
+- [build] Switch from exclude to include for more precise package contents
 - [gateway] More descriptive error messages for subscription-related issues
 - [protocol] Add `ads_audio` field to user options structure
 

Cargo.toml

@@ -10,8 +10,16 @@ readme = "README.md"
 repository = "https://github.com/roderickvd/pleezer/"
 categories = ["multimedia::audio"]
 keywords = ["audio", "deezer", "player"]
-exclude = ["secrets.toml"]
 documentation = "https://docs.rs/pleezer"
+include = [
+    "src/**/*",
+    "build.rs",
+    "Cargo.lock",
+    "Cargo.toml",
+    "LICENSE.md",
+    "README.md",
+    "secrets.toml.example",
+]
 
 [badges]
 maintenance = { status = "actively-developed" }