Add disarium-number module: loop, String and stream approaches, dry run, counts to 10^8

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ

disarium-number/README.md

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+# disarium-number
+
+Disarium number checks in plain Java 25: the original `Math.pow` loop, an integer-power loop, a
+String version, a Streams version and a `log10` digit-count variant. A test proves they agree, and
+`output/` holds the transcripts quoted in the post. Companion to
+[Disarium Number in Java: Program, Algorithm and All Disarium Numbers from 1 to 1000](https://ankurm.com/disarium-number-in-java/).
+
+## Versions
+
+| Component | Version |
+|---|---|
+| JDK | 25.0.5+8 (Temurin LTS), `--release 25` |
+| JUnit Jupiter | 6.1.3 |
+| Maven | 3.9.11 |
+
+## Run it
+
+```bash
+cd disarium-number
+./scripts/run.sh check        # also: list | dryrun | approaches | digits | count
+mvn test                      # 6 tests
+./scripts/run-all.sh          # regenerates output/*.txt (count takes ~2 minutes)
+```
+
+`count` brute-forces every int up to 10^8; the timing depends on your machine.