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

snippets/org-mode/adr

@@ -0,0 +1,19 @@
+# -*- mode: snippet -*-
+# name: ADR - Architectural Decision Record
+# key: adr
+# --
+* ADR-${1:0001}: ${2:Title}
+:PROPERTIES:
+:date:   `(format-time-string "%Y-%m-%d")`
+:status: ${3:Proposed}
+:END:
+
+** Context
+${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