Add SpeckDL compiler scaffold

- CLI entry point with yargs parsing for speckl-compile <file> --output-dir --bom-format
- TypeScript parser with AST types for all SpeckDL primitives
- Generator for PROV-O JSON-LD provenance graphs
- Generator for CycloneDX v1.6 BOMs
- Generator for SPDX 3.0.1 BOMs
- E2E test verifying RetryHandler.speck parsing and all output formats

All tests pass.

compiler/test-output/RetryHandler.specbom.cdx.json

@@ -0,0 +1,74 @@
+{
+  "bomFormat": "CycloneDX",
+  "specVersion": "1.6",
+  "components": [],
+  "metadata": {
+    "tools": [],
+    "component": {
+      "type": "application",
+      "name": "RetryHandler",
+      "version": "0.2.0",
+      "properties": [
+        {
+          "name": "speckl:derivesFrom",
+          "value": "FaultHandler"
+        },
+        {
+          "name": "speckl:satisfies",
+          "value": "RESILIENCE"
+        },
+        {
+          "name": "speckl:satisfies",
+          "value": "RESILIENCE"
+        }
+      ]
+    }
+  },
+  "annotations": [
+    {
+      "subject": "speck:RetryHandler",
+      "annotations": [
+        {
+          "type": "tag",
+          "value": "provenanceType",
+          "text": "author"
+        }
+      ],
+      "author": {
+        "name": "\"",
+        "email": "Scott Scoble"
+      },
+      "timestamp": "2026-04-29T22:11:59.832Z"
+    },
+    {
+      "subject": "speck:RetryHandler",
+      "annotations": [
+        {
+          "type": "tag",
+          "value": "provenanceType",
+          "text": "source"
+        }
+      ],
+      "author": {
+        "name": "Speckl Compiler",
+        "email": "compiler@speckl.scoble.me"
+      },
+      "timestamp": "2026-04-29T22:11:59.832Z"
+    },
+    {
+      "subject": "speck:RetryHandler",
+      "annotations": [
+        {
+          "type": "tag",
+          "value": "reviewType",
+          "text": "manual"
+        }
+      ],
+      "author": {
+        "name": "Speckl Compiler",
+        "email": "compiler@speckl.scoble.me"
+      },
+      "timestamp": "2026-04-29T22:11:59.832Z"
+    }
+  ]
+}