Refactor and expand unit tests for TBarSeries, TSeries, and TValue classes

- Enhanced TBarSeriesTests with additional constructors, methods, and assertions for better coverage.
- Improved TSeriesTests to include new constructors, methods, and edge cases.
- Expanded TValueTests to cover constructors, implicit conversions, equality checks, and hash codes.
- Updated project file to target .NET 10.0 and include internal visibility for tests.
- Added Codacy configuration for code quality checks.

.codacy/codacy.yaml

@@ -0,0 +1,15 @@
+runtimes:
+    - dart@3.7.2
+    - go@1.22.3
+    - java@17.0.10
+    - node@22.2.0
+    - python@3.11.11
+tools:
+    - dartanalyzer@3.7.2
+    - eslint@8.57.0
+    - lizard@1.17.31
+    - pmd@7.11.0
+    - pylint@3.3.6
+    - revive@1.7.0
+    - semgrep@1.78.0
+    - trivy@0.66.0