Additional JCE MessageDigest OID values for SHA-224/256/384/512

[cconlon]

This PR adds OID alias support for SHA-224, SHA-256, SHA-384, and SHA-512 MessageDigest algorithms in the wolfJCE provider.

• Registers OID aliases (2.16.840.1.101.3.4.2.x) for SHA-2 family algorithms in WolfCryptProvider
• Adds test cases verifying MessageDigest can be retrieved by OID and produces identical output
• Update README_JCE.md with supported OID values

Allows users to obtain MessageDigest instances using standard NIST OIDs instead of algorithm names

[Copilot]

Pull Request Overview

This PR adds OID alias support for SHA-2 family MessageDigest algorithms (SHA-224, SHA-256, SHA-384, and SHA-512) in the wolfJCE provider, allowing users to obtain MessageDigest instances using standard NIST OIDs.

• Registers OID aliases (2.16.840.1.101.3.4.2.x) for SHA-2 algorithms in WolfCryptProvider
• Adds test cases verifying MessageDigest retrieval by OID produces identical output to algorithm name
• Updates README_JCE.md documentation with supported OID values

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/main/java/com/wolfssl/provider/jce/WolfCryptProvider.java	Registers OID aliases for SHA-224, SHA-256, SHA-384, and SHA-512 MessageDigest algorithms
src/test/java/com/wolfssl/provider/jce/test/WolfCryptMessageDigestSha224Test.java	Adds testSha224OidAlias test case
src/test/java/com/wolfssl/provider/jce/test/WolfCryptMessageDigestSha256Test.java	Adds testSha256OidAlias test case
src/test/java/com/wolfssl/provider/jce/test/WolfCryptMessageDigestSha384Test.java	Adds testSha384OidAlias test case
src/test/java/com/wolfssl/provider/jce/test/WolfCryptMessageDigestSha512Test.java	Adds testSha512OidAlias test case
README_JCE.md	Documents OID values for SHA-2 family algorithms

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