feat: add yasnippet snippets dir — ADR for org-mode and markdown-mode

snippets/markdown-mode/adr

@@ -0,0 +1,18 @@
+# -*- mode: snippet -*-
+# name: ADR - Architectural Decision Record
+# key: adr
+# --
+# ADR-${1:0001}: ${2:Title}
+
+- **Date:** `(format-time-string "%Y-%m-%d")`
+- **Status:** ${3:Proposed}
+
+## Context
+${4:Describe the context and problem statement.}
+
+## Decision
+${5:Describe the decision and rationale.}
+
+## Consequences
+${6:Describe the resulting context after applying the decision.}
+$0