fix: single source of truth for version across crate and tests

Replace all hardcoded "1.1.0" version strings with env!("CARGO_PKG_VERSION")
in src/, so Cargo.toml is the sole source for the built binary. Tests
intentionally use a separate hardcoded constant in tests/common.rs to act
as a canary — they will fail on a version bump until manually updated.

- src/project/mod.rs: add WEEVIL_VERSION const, wire into Tera context,
  generated README, and .weevil-version marker
- tests/common.rs: new file, holds EXPECTED_VERSION for all test crates
- tests/{integration,project_lifecycle,unit/config_tests}.rs: pull from
  common instead of env! or inline literals

src/project/mod.rs

@@ -7,6 +7,8 @@ use git2::Repository;
 
 use crate::sdk::SdkConfig;
 
+const WEEVIL_VERSION: &str = env!("CARGO_PKG_VERSION");
+
 pub mod deployer;
 pub mod config;
 
@@ -68,7 +70,7 @@ impl ProjectBuilder {
         let mut _context = TeraContext::new();
         _context.insert("project_name", &self.name);
         _context.insert("sdk_dir", &sdk_config.ftc_sdk_path.to_string_lossy());
-        _context.insert("generator_version", "1.0.0");
+        _context.insert("generator_version", WEEVIL_VERSION);
         
         self.create_project_files(project_path, sdk_config)?;
         
@@ -84,7 +86,7 @@ impl ProjectBuilder {
         let readme = format!(
             r#"# {}
 
-FTC Robot Project generated by Weevil v1.0.0
+FTC Robot Project generated by Weevil v{}
 
 ## Quick Start
 ```bash
@@ -111,7 +113,7 @@ deploy.bat
 2. Test locally: `./gradlew test`
 3. Deploy: `./deploy.sh` (or `deploy.bat` on Windows)
 "#,
-            self.name
+            self.name, WEEVIL_VERSION
         );
         fs::write(project_path.join("README.md"), readme)?;
         
@@ -120,7 +122,7 @@ deploy.bat
         fs::write(project_path.join(".gitignore"), gitignore)?;
         
         // Version marker
-        fs::write(project_path.join(".weevil-version"), "1.0.0")?;
+        fs::write(project_path.join(".weevil-version"), WEEVIL_VERSION)?;
         
         // build.gradle.kts - Pure Java with deployToSDK task
         // Escape backslashes for Windows paths in Kotlin strings