feat: negotiate NETCONF capabilities and type rpc-errors

Teach sessions to negotiate the shared NETCONF base capability and gate operations against what the server actually advertises.

Add structured RpcErrorException and ValidateException flows, harden rpc-error parsing for namespaced replies, and update commit/load/validate behavior to preserve server detail.

Back the change with unit and integration coverage, Javadocs for the new public API, and a sanitized integration runner/docs path story.

Refactor netconf-java to remove Lombok and improve Java compatibility

- Removed all Lombok annotations and replaced with explicit builders, constructors, and accessors
- Fixed SpotBugs warnings (EI_EXPOSE_REP, UPM, DLS) with defensive copies and suppression annotations
- Improved XML parsing robustness and logging for better debuggability
- Removed unused or redundant private methods and variables
- Prepped codebase for modern Java versions (Java 17+ compatibility)

This refactor preserves public APIs but improves maintainability, static analysis, and future extensibility.

Highlights
	•	Gradle 8 / Java 17 compatibility
	•	Added Gradle wrapper & build instructions, updated .gitignore (build/)
	•	Upgraded SpotBugs to 6.x; replaced deprecated string→enum coercion
	•	Adopted Gradle Testing Suites DSL (useJUnitJupiter('5.11.1')) and removed manual JUnit deps
	•	Eliminated all empty <p> tags, malformed HTML, missing @param/@return, and default-ctor warnings
	•	Added @SuppressWarnings("unchecked") where parent class returns raw types
	•	Deprecated API cleanup
	•	Replaced MockitoAnnotations.initMocks with openMocks + AutoCloseable teardown
	•	README refresh

These changes remove all Javadoc/SpotBugs/Gradle deprecation warnings and prepare the project for Gradle 9 + Java 17 while keeping Maven support intact.
* Merged :confirmed-commit:1.1, cancel-commit & kill-session bullet-points
  into the existing **v2.2.0** changelog
* Updated headline, feature list, build instructions (Gradle wrapper note),
  and Maven/Gradle code snippet (try-with-resources)

Added Integration tests. You can use juniper crpd eval and run with docker/colima. Once you set up a basic config to enable ssh and netconf, you can run the integration tests

Added tests to validate RFC 6242 MUSTs

Remove Xalan from the dependencies (#67)

* Update dependencies to the most recent version

* Remove xalan from the set of dependencies

* Bump version to next release

Only depend on the SLF4 API (#56)

The user of the library includes a logging dependency. Most spring and
micronaut projects use logback, and that works perfectly with the slf4j
APIs. It conflicts with the slf4j-log4j12 dependency, however, and
that's surprising as a library consumer, it requires special logic to
exclude the dependency.

Create a Hello.java to parse and create <hello> messages to resolve i…

…ssue with XML namespace prefixes (#50)

Update README.md

Updated the version for release

NETCONF RFC6241 and RFC6242 conformance fixes (#22)

* - NETCONF RFC6241 and RFC6242 conformance fixes
  . xml version conformance
  . hello message conformance
  . rpc message conformance
  . framing protocol conformance
- Extracting reused strings to constants
- updated gitignore

* - used single imports
- fixed broken idents caused by auto-formatting

* increased version to 2.0.1

Update README.md

Merge pull request #19 from peterjhill/commit-full-support

Added method to perform "commit full" on the router.