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.spdx.json

@@ -0,0 +1,107 @@
+{
+  "@context": [
+    "https://spdx.github.io/spdx-v3/spdx-context.jsonld",
+    {
+      "speckl": "https://speckl.scoble.me/ns/v0.2#"
+    }
+  ],
+  "@type": "spdx:Document",
+  "spdx": {
+    "@id": "spdx:RetryHandler",
+    "@type": "spdx:Snippet",
+    "name": "RetryHandler",
+    "spdxVersion": "3.0.1",
+    "dataLicense": "CC0-1.0",
+    "creationInfo": {
+      "created": "2026-04-29T22:11:59.833Z",
+      "createdBy": [
+        "Organization: Speckl",
+        "tool: speckl-compile-0.2.0"
+      ]
+    },
+    "annotations": [
+      {
+        "@type": "spdx:Annotation",
+        "annotationType": "spdx:REVIEW",
+        "annotator": {
+          "@type": "spdx:Tool",
+          "name": "speckl-compile"
+        },
+        "timestamp": "2026-04-29T22:11:59.833Z",
+        "comment": "Review type: manual"
+      }
+    ]
+  },
+  "builtBy": [],
+  "relationships": [
+    {
+      "from": {
+        "@id": "spdx:RetryHandler"
+      },
+      "to": {
+        "@id": "spdx:speck:FaultHandler"
+      },
+      "relationshipType": "spdx:derivesFrom"
+    },
+    {
+      "from": {
+        "@id": "spdx:RetryHandler"
+      },
+      "to": {
+        "@id": "spdx:requirement:RESILIENCE"
+      },
+      "relationshipType": "speckl:satisfies"
+    },
+    {
+      "from": {
+        "@id": "spdx:RetryHandler"
+      },
+      "to": {
+        "@id": "spdx:requirement:RESILIENCE"
+      },
+      "relationshipType": "speckl:satisfies"
+    },
+    {
+      "from": {
+        "@id": "spdx:RetryHandler"
+      },
+      "to": {
+        "@id": "spdx:agent:\""
+      },
+      "relationshipType": "spdx:wasAttributedTo"
+    },
+    {
+      "from": {
+        "@id": "spdx:RetryHandler"
+      },
+      "to": {
+        "@id": "spdx:source:architecture_review:\""
+      },
+      "relationshipType": "spdx:wasInformedBy"
+    }
+  ],
+  "elements": [
+    {
+      "@type": "spdx:Requirement",
+      "@id": "spdx:requirement:RESILIENCE",
+      "name": "RESILIENCE"
+    },
+    {
+      "@type": "spdx:Requirement",
+      "@id": "spdx:requirement:RESILIENCE",
+      "name": "RESILIENCE"
+    },
+    {
+      "@type": "spdx:Person",
+      "@id": "spdx:agent:\"",
+      "name": "\"",
+      "email": "Scott Scoble"
+    },
+    {
+      "@type": "spdx:Activity",
+      "@id": "spdx:source:architecture_review:\"",
+      "name": "architecture_review - \"",
+      "type": "architecture_review"
+    }
+  ]
+}