Implement GCRA rate limiting

[a-TODO-rov]

resolves #4474

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Note

Medium Risk
Adds a new Redis command surface (GCRA) across Jedis, UnifiedJedis, and pipelining plus new request/response types, which could affect command routing/serialization and API compatibility. CI/test matrix is also expanded to Redis 8.8, potentially surfacing version-specific behavior changes.

Overview
Adds first-class support for Redis GCRA rate limiting, including new GCRAParams for argument building (with optional NUM_REQUESTS) and GCRAResponse parsing, and wires the command through Protocol, CommandObjects, Jedis, UnifiedJedis, and pipeline interfaces.

Extends integration/unit coverage with new GCRA tests (string + binary, unified + jedis) and updates the test environment to include Redis 8.8 (workflow matrix, Makefile supported versions, and new .env.v8.8). Also simplifies RediSearch drop-index assertions to use assertThrows.

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[github-actions]

Test Results

   309 files  + 1     309 suites  +1   11m 58s ⏱️ -7s
11 203 tests +67  11 102 ✅ +22  101 💤 +45  0 ❌ ±0 
 5 888 runs  +37   5 864 ✅ +22   24 💤 +15  0 ❌ ±0 

Results for commit d3fed3b. ± Comparison against base commit 6d3ac4e.

♻️ This comment has been updated with latest results.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Response builder uses fragile List cast

Low Severity

The GCRA_RESPONSE_BUILDER casts data to List<Long>, which is unique among all response builders in this package — others consistently use List<Object> and convert elements individually. Due to type erasure, this unchecked cast always succeeds at runtime, but individual element access will throw ClassCastException if any value is a non-Long type (e.g., a Double returned under RESP3). Since retryAfter and fullBurstAfter represent fractional seconds and period is a double, this is a plausible concern.